Natural disaster

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(Redirected from
Natural hazard
)
For other uses, see Natural disaster (disambiguation).

Global multihazard proportional economic loss by natural disasters as cyclones, droughts, earthquakes, floods, landslides and volcanoes

A natural disaster is the highly harmful impact on a society or community following a natural

resilience and on the infrastructure available.[2] Scholars have been saying that the term natural disaster is unsuitable and should be abandoned. Instead, the simpler term disaster could be used, while also specifying the category (or type) of hazard.[3][4][5] A disaster is a result of a natural or human-made hazard impacting a vulnerable community
. It is the combination of the hazard along with exposure of a vulnerable society that results in a disaster.

In modern times, the divide between natural, human-made and human-accelerated disasters is quite difficult to draw.

climate change[13] potentially play a role in causing natural disasters. In fact, the term natural disaster was called a misnomer already in 1976.[5]

Natural disasters can be aggravated by inadequate building norms, marginalization of people, inequities, overexploitation of resources, extreme urban sprawl and climate change.[6] The rapid growth of the world's population and its increased concentration often in hazardous environments has escalated both the frequency and severity of disasters. Extreme climates (such as those in the Tropics) and unstable landforms, coupled with deforestation, unplanned growth proliferation and non-engineered constructions create more vulnerable interfaces of populated areas with disaster-prone natural spaces. Developing countries which suffer from chronic natural disasters, often have ineffective communication systems combined with insufficient support for disaster prevention and management.[14]

An adverse event will not rise to the level of a disaster if it occurs in an area without a vulnerable population.[15][16] Once a vulnerable population has experienced a disaster, the community can take many years to repair and that repair period can lead to further vulnerability. The disastrous consequences of natural disaster also affect the mental health of affected communities, often leading to post-traumatic symptoms. These increased emotional experiences can be supported through collective processing, leading to resilience and increased community engagement.[17]

Terminology

A natural disaster is the highly harmful impact on a society or community following a natural hazard event. The term "disaster" itself is defined as follows: "Disasters are serious disruptions to the functioning of a community that exceed its capacity to cope using its own resources. Disasters can be caused by natural, man-made and technological hazards, as well as various factors that influence the exposure and vulnerability of a community."[18]

The US Federal Emergency Management Agency (FEMA) explains the relationship between natural disasters and natural hazards as follows: "Natural hazards and natural disasters are related but are not the same. A natural hazard is the threat of an event that will likely have a negative impact. A natural disaster is the negative impact following an actual occurrence of natural hazard in the event that it significantly harms a community.[1] An example of the distinction between a natural hazard and a disaster is that an earthquake is the hazard which caused the 1906 San Francisco earthquake disaster.

A natural hazard

land-use change, drainage and construction.[21]

There are 18 natural hazards included in the National Risk Index of FEMA: avalanche, coastal flooding, cold wave, drought, earthquake, hail, heat wave, tropical cyclone, ice storm, landslide, lightning, riverine flooding, strong wind, tornado, tsunami, volcanic activity, wildfire, winter weather.[1] In addition there are also tornados and dust storms.

Critique

The term natural disaster has been called a misnomer already in 1976.[5] A disaster is a result of a natural hazard impacting a vulnerable community. But disasters can be avoided. Earthquakes, droughts, floods, storms, and other events lead to disasters because of human action and inaction. Poor land and policy planning and deregulation can create worse conditions. They often involve development activities that ignore or fail to reduce the disaster risks. Nature alone is blamed for disasters even when disasters result from failures in development. Disasters also result from failure of societies to prepare. Examples for such failures include inadequate building norms, marginalization of people, inequities, overexploitation of resources, extreme urban sprawl and climate change.[5]

Defining disasters as solely natural events has serious implications when it comes to understanding the causes of a disaster and the distribution of political and financial responsibility in disaster risk reduction, disaster management, compensation, insurance and disaster prevention.[22] Using natural to describe disasters misleads people to think the devastating results are inevitable, out of our control, and are simply part of a natural process. Hazards (earthquakes, hurricanes, pandemics, drought etc.) are inevitable, but the impact they have on society is not.

Thus, the term natural disaster is unsuitable and should be abandoned in favour of the simpler term disaster, while also specifying the category (or type) of hazard.[3]

Scale

Main articles: List of natural disasters by death toll and List of countries by natural disaster risk
Number of recorded natural disaster events (1900–2022)

Some of the 18 natural hazards included in the National Risk Index of FEMA[1] now have a higher probability of occurring, and at higher intensity, due to the effects of climate change. This applies to heat waves, droughts, wildfire and coastal flooding.[23]: 9 

By region and country

As of 2019, the countries with the highest share of disability-adjusted life years (DALY) lost due to natural disasters are Bahamas, Haiti, Zimbabwe and Armenia (probably mainly due to the Spitak Earthquake).[24][25] The Asia-Pacific region is the world's most disaster prone region.[26] A person in Asia-Pacific is five times more likely to be hit by a natural disaster than someone living in other regions.[27]

Between 1995 and 2015, the greatest number of natural disasters occurred in America, China and India.[28] In 2012, there were 905 natural disasters worldwide, 93% of which were weather-related disasters. Overall costs were US$170 billion and insured losses $70 billion. 2012 was a moderate year. 45% were meteorological (storms), 36% were hydrological (floods), 12% were climatological (heat waves, cold waves, droughts, wildfires) and 7% were geophysical events (earthquakes and volcanic eruptions). Between 1980 and 2011 geophysical events accounted for 14% of all natural catastrophes.[29]

Slow and rapid onset events

Natural hazards occur across different time scales as well as area scales. Tornadoes and flash floods are rapid onset events, meaning they occur with a short warning time and are short-lived. Slow onset events can also be very damaging, for example drought is a natural hazards that develops slowly, sometimes over years.[30]

Impacts

Global death rate from natural disasters (1900–2022)
Global damage cost from natural disasters (1980–2022)

A natural disaster may cause loss of life, injury or other health impacts, property damage, loss of livelihoods and services, social and economic disruption, or environmental damage.

Various phenomena like

cyclones, wildfires, and pandemics are all natural hazards that kill thousands of people and destroy billions of dollars of habitat and property each year.[31] However, the rapid growth of the world's population and its increased concentration often in hazardous environments has escalated both the frequency and severity of disasters. With the tropical climate and unstable landforms, coupled with deforestation, unplanned growth proliferation, non-engineered constructions make the disaster-prone areas more vulnerable.[citation needed
]

The death rate from natural disasters is highest in poorly developed countries due to the lower quality of building construction, infrastructure, and medical facilities.[32] Globally, the total number of deaths from natural disasters has been reduced by 75% over the last 100 years, due to the increased development of countries, increased preparedness, better education, better methods, and aid from international organizations. Since the global population has grown over the same time period, the decrease in number of deaths per capita is larger, dropping to 6% of the original amount.[32]

On the environment

During emergencies such as natural disasters and armed conflicts more waste may be produced, while waste management is given low priority compared with other services. Existing waste management services and infrastructures can be disrupted, leaving communities with unmanaged waste and increased littering. Under these circumstances human health and the environment are often negatively impacted.[33]

Natural disasters (e.g. earthquakes, tsunamis, hurricanes) have the potential to generate a significant amount of waste within a short period. Waste management systems can be out of action or curtailed, often requiring considerable time and funding to restore. For example, the tsunami in Japan in 2011 produced huge amounts of debris: estimates of 5 million tonnes of waste were reported by the Japanese Ministry of the Environment. Some of this waste, mostly plastic and styrofoam washed up on the coasts of Canada and the United States in late 2011. Along the west coast of the United States, this increased the amount of litter by a factor of 10 and may have transported alien species. Storms are also important generators of plastic litter. A study by Lo et al. (2020) reported a 100% increase in the amount of microplastics on beaches surveyed following a typhoon in Hong Kong in 2018.[33]

A significant amount of plastic waste can be produced during disaster relief operations. Following the 2010 earthquake in Haiti, the generation of waste from relief operations was referred to as a "second disaster". The United States military reported that millions of water bottles and styrofoam food packages were distributed although there was no operational waste management system. Over 700,000 plastic tarpaulins and 100,000 tents were required for emergency shelters. The increase in plastic waste, combined with poor disposal practices, resulted in open drainage channels being blocked, increasing the risk of disease.[33]

Conflicts can result in large-scale displacement of communities. People living under these conditions are often provided with minimal waste management facilities. Burn pits are widely used to dispose of mixed wastes, including plastics. Air pollution can lead to respiratory and other illnesses. For example, Sahrawi refugees have been living in five camps near Tindouf, Algeria for nearly 45 years. As waste collection services are underfunded and there is no recycling facility, plastics have flooded the camps’ streets and surroundings. In contrast, the Azraq camp in Jordan for refugees from Syria has waste management services; of 20.7 tonnes of waste produced per day, 15% is recyclable.[33]

On vulnerable groups

Women

Because of the social, political and cultural context of many places throughout the world, women are often disproportionately affected by disaster.

gender based violence and are increasingly vulnerable to sexual violence. Disrupted police enforcement, lax regulations, and displacement all contribute to increased risk of gender based violence and sexual assault.[34] Women who have been affected by sexual violence are at a significantly increased risk of sexually transmitted infections, unique physical injuries and long term psychological consequences.[34] All of these long-term health outcomes can prevent successful reintegration into society after the disaster recovery period.[34]

In addition to

Jennifer McCreight organised the Boobquake event on 26 April 2010: she encouraged women around the world to participate in dressing immodestly all at the same time while performing regular seismographic checks to prove that such behaviour in women causes no significant increase in earthquake activity.[38]

During and after natural disasters, routine health behaviors become interrupted. In addition, health care systems may have broken down as a result of the disaster, further reducing access to contraceptives.[34] Unprotected intercourse during this time can lead to increased rates of childbirth, unintended pregnancies and sexually transmitted infections (STIs).[34][39] Methods used to prevent STIs (such as condom use) are often forgotten or not accessible during times surrounding a disaster. Lack of health care infrastructure and medical shortages hinder the ability to treat individuals once they acquire an STI. In addition, health efforts to prevent, monitor or treat HIV/AIDS are often disrupted, leading to increased rates of HIV complications and increased transmission of the virus through the population.[34]

Pregnant women are one of the groups disproportionately affected by natural disasters. Inadequate nutrition, little access to clean water, lack of health-care services and psychological stress in the aftermath of the disaster can lead to a significant increase in maternal morbidity and mortality. Furthermore, shortage of healthcare resources during this time can convert even routine obstetric complications into emergencies.[40] During and after a disaster, women's prenatal, peri-natal and postpartum care can become disrupted.[39] Among women affected by natural disaster, there are significantly higher rates of low birth weight infants, preterm infants and infants with low head circumference.[34][41]

On governments and voting processes

Everyone is desperate for food and water. There's no food, water, or gasoline. The government is missing.
— Lian Gogali Aid worker following 2018 Sulawesi earthquake and tsunami.[42]

Disasters stress government capacity, as the government tries to conduct routine as well as emergency operations.

disaster preparedness, which may end up affecting government incentives to invest in such preparedness.[46] Other evidence, however, also based on the United States, finds that citizens can simply backlash and blame the incumbent for hardship following a natural disaster, causing the incumbent party to lose votes.[47] One study in India finds that incumbent parties extend more relief following disasters in areas where there is higher newspaper coverage, electoral turnout, and literacy – the authors reason that these results indicate that incumbent parties are more responsive with relief to areas with more politically informed citizens who would be more likely to punish them for poor relief efforts.[48]

Violent conflicts within states can exacerbate the impact of natural disasters by weakening the ability of states, communities and individuals to provide disaster relief. Natural disasters can also worsen ongoing conflicts within states by weakening the capacity of states to fight rebels.[49][50]

In Chinese and Japanese history, it has been routine for

era names or capital cities and palaces of emperors to be changed after a major natural disaster, chiefly for political reasons such as association with hardships by the populace and fear of upheaval (i.e. in East Asian government chronicles, such fears were recorded in a low profile way as an unlucky name or place requiring change).[51]

Disasters caused by geological hazards

Landslides

This section is an excerpt from Landslide.[edit]
Cusco, Peru
, in 2018
A NASA model has been developed to look at how potential landslide activity is changing around the world.
Animation of a landslide in San Mateo County, California

slope failures and debris flows.[55] Landslides occur in a variety of environments, characterized by either steep or gentle slope gradients, from mountain ranges to coastal cliffs or even underwater,[56] in which case they are called submarine landslides
.

Gravity is the primary driving force for a landslide to occur, but there are other factors affecting slope stability that produce specific conditions that make a slope prone to failure. In many cases, the landslide is triggered by a specific event (such as a heavy rainfall, an earthquake, a slope cut to build a road, and many others), although this is not always identifiable.

Landslides are frequently made worse by human development (such as urban sprawl) and resource exploitation (such as mining and deforestation). Land degradation frequently leads to less stabilization of soil by vegetation.[57] Additionally, global warming caused by climate change and other human impact on the environment, can increase the frequency of natural events (such as extreme weather) which trigger landslides.[58] Landslide mitigation describes the policy and practices for reducing the risk of human impacts of landslides, reducing the risk of natural disaster.
See also:
List of avalanches
A landslide in San Clemente, California in 1966

Avalanches

This section is an excerpt from Avalanche.[edit]
A powder snow avalanche in the Himalayas near Mount Everest.
Heavy equipment in action after an avalanche has interrupted service on the Saint-Gervais–Vallorcine railway in Haute-Savoie, France (2006).
The terminus of an avalanche in Alaska's Kenai Fjords.
Alaska Railroad track blocked by a snow slide

An avalanche is a rapid flow of snow down a slope, such as a hill or mountain.[59]

Avalanches can be triggered by spontaneously, by factors such as increased precipitation or snowpack weakening, or by external means such as humans, other animals, and earthquakes. Primarily composed of flowing snow and air, large avalanches have the capability to capture and move ice, rocks, and trees.

Avalanches can happen in any mountain range that has an enduring snowpack. They are most frequent in winter or spring, but may occur at any time of the year. In mountainous areas, avalanches are among the most serious
natural hazards to life and property, so great efforts are made in avalanche control
.

Earthquakes

Main article: Earthquake
See also: Lists of earthquakes and Soil liquefaction
San Francisco was devastated by an earthquake in 1906
Global number of deaths from earthquake (1960–2017)
Global number of recorded earthquake events (1901–2019)

An earthquake is the result of a sudden release of energy in the Earth's crust that creates seismic waves. At the Earth's surface, earthquakes manifest themselves by vibration, shaking, and sometimes displacement of the ground. Earthquakes are caused by slippage within geological faults. The underground point of origin of the earthquake is called the seismic focus. The point directly above the focus on the surface is called the epicenter. Earthquakes by themselves rarely kill people or wildlife – it is usually the secondary events that they trigger, such as building collapse, fires, tsunamis and volcanic eruptions, that cause death. Many of these can possibly be avoided by better construction, safety systems, early warning and planning.[citation needed]

Sinkholes

Main article: Sinkhole
See also:
Tropical Storm Agatha, diverted by leaking pipes into a pumice bedrock, led to the sudden collapse of the ground beneath a factory building.[60]

Coastal erosion

See also:
Coastal and oceanic landforms, Coastal development hazards, Coastal geography, Coastal engineering, Coastal morphodynamics, and Bioerosion

Coastal erosion is a physical process by which shorelines in coastal areas around the world shift and change, primarily in response to waves and currents that can be influenced by tides and storm surge.[61] Coastal erosion can result from long-term processes (see also beach evolution) as well as from episodic events such as tropical cyclones or other severe storm events. Coastal erosion is one of the most significant coastal hazards. It forms a threat to infrastructure, capital assets and property.

Volcanic eruptions

See also: Types of volcanic eruptions and List of largest volcanic eruptions
Puʻu ʻŌʻō

pyroclastic flows, consisting of a cloud of hot ash which builds up in the air above the volcano and rushes down the slopes when the eruption no longer supports the lifting of the gases. It is believed that Pompeii was destroyed by a pyroclastic flow. A lahar is a volcanic mudflow or landslide. The 1953 Tangiwai disaster was caused by a lahar, as was the 1985 Armero tragedy in which the town of Armero was buried and an estimated 23,000 people were killed.[citation needed
]

Volcanoes rated at 8 (the highest level) on the

Volcanic Explosivity Index are known as supervolcanoes. According to the Toba catastrophe theory, 75,000 to 80,000 years ago, a supervolcanic eruption at what is now Lake Toba in Sumatra reduced the human population to 10,000 or even 1,000 breeding pairs, creating a bottleneck in human evolution,[62]
and killed three-quarters of all plant life in the northern hemisphere. However, there is considerable debate regarding the veracity of this theory. The main danger from a supervolcano is the immense cloud of ash, which has a disastrous global effect on climate and temperature for many years.

Disasters caused by water hazards

The Limpopo River during the 2000 Mozambique flood

A hydrological disaster is a violent, sudden and destructive change either in the quality of Earth's water or in the distribution or movement of water on land below the surface or in the atmosphere.

Floods

Main article: Flood
See also: List of floods

A

tides. Flooding may result from the volume of a body of water, such as a river or lake, becoming higher than usual, causing some of the water to escape its usual boundaries.[65]
While the size of a lake or other body of water will vary with seasonal changes in precipitation and snow melt, a flood is not considered significant unless the water covers land used by humans, such as a village, city or other inhabited area, roads or expanses of farmland.

Tsunami

1755 copper engraving depicting Lisbon in ruins and in flames after the 1755 Lisbon earthquake. A tsunami overwhelms the ships in the harbor.
Main article: Tsunami
See also:
List of historical tsunamis

A tsunami (plural: tsunamis or tsunami; from Japanese: 津波, lit. "harbour wave"; English pronunciation: /tsuːˈnɑːmi/), also known as a seismic sea wave or tidal wave, is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Tsunamis can be caused by undersea earthquakes such as the

one in 1958 at Lituya Bay, Alaska, or by volcanic eruptions such as the ancient eruption of Santorini. On March 11, 2011, a tsunami occurred near Fukushima, Japan
and spread through the Pacific Ocean.

Limnic eruptions

Main article: Limnic eruption

A

asphyxiation
.

Disasters caused by extreme weather hazards

Hot and dry conditions

Heat waves

Main article: Heat wave
See also: List of heat waves

A heat wave is a period of unusually and excessively hot weather. Heat waves are rare and require specific combinations of

2010 Northern Hemisphere summer
resulted in severe heat waves which killed over 2,000 people. The heat caused hundreds of wildfires which led to widespread air pollution and burned thousands of square kilometers of forest.

Droughts

Main article: Drought
See also: List of droughts
This section is an excerpt from Drought.[edit]
xxx
xxx
xxx
xxx
Droughts cause a range of impacts and are often worsened by to the effects of climate change on the water cycle: a dry riverbed in France; sandstorm in Somaliland due to drought; droughts negatively impact agriculture in Texas; drought and high temperatures worsened the 2020 bushfires in Australia.
A drought is a period of drier-than-normal conditions.[66]: 1157  A drought can last for days, months or years. Drought often has large impacts on the ecosystems and agriculture of affected regions, and causes harm to the local economy.[67][68] Annual dry seasons in the tropics significantly increase the chances of a drought developing, with subsequent increased wildfire risks.[69] Heat waves can significantly worsen drought conditions by increasing evapotranspiration.[70] This dries out forests and other vegetation, and increases the amount of fuel for wildfires.[69][71]

Well-known historical droughts include the 1997–2009 Millennium Drought in Australia which led to a water supply crisis across much of the country. As a result, many desalination plants were built for the first time (see list). In 2011, the State of Texas lived under a drought emergency declaration for the entire calendar year and suffered severe economic losses.[72] The drought caused the Bastrop fires.

Duststorms

This section is an excerpt from Dust storm.[edit]
A
deposits
it in another.

Firestorms

This section is an excerpt from Firestorm.[edit]
A
storm-force winds from every point of the compass towards the storm's center, where the air is heated and then ascends.[75][76]

Wildfires

wildfire in California
.
Main article: Wildfire
See also:
List of forest fires

Victorian bushfires in Australia.[77][78][79][80][81]

Storms

Tropical cyclone

See also: Tropical cyclones and climate change

tropical storm that forms over an ocean. It is caused by evaporated water that comes off of the ocean and becomes a storm
. It is characterized by strong winds, heavy rainfall and thunderstorms. The determining factor on which term is used is based on where the storm originates. In the Atlantic and Northeast Pacific, the term "hurricane" is used; in the Northwest Pacific, it is referred to as a "typhoon"; a "cyclone" occurs in the South Pacific and Indian Ocean.

The deadliest hurricane ever was the 1970 Bhola cyclone; the deadliest Atlantic hurricane was the Great Hurricane of 1780, which devastated Martinique, St. Eustatius and Barbados. Another notable hurricane is Hurricane Katrina, which devastated the Gulf Coast of the United States in 2005. Hurricanes may become more intense and produce more heavy rainfall as a consequence of human-induced climate change.

Thunderstorms

A classic anvil-shaped, and clearly-developed Cumulonimbus incus
Main article: Thunderstorm

Severe storms, dust clouds and volcanic eruptions can generate

mud brick housing provides little protection.[84]

Tornadoes

A rope tornado in its dissipating stage, Tecumseh, Oklahoma.
See also:
List of tornadoes and tornado outbreaks

A

low pressure circulation. Tornadoes come in many shapes and sizes but typically take the form of a visible condensation funnel, the narrow end of which touches the Earth and is often encircled by a cloud of debris and dust. Tornadoes can occur one at a time, or can occur in large tornado outbreaks associated with supercells
or in other large areas of thunderstorm development.

Most tornadoes have wind speeds of less than 180 km/h (110 mph), are approximately 75 m (250 ft) across, and travel a few kilometers before dissipating. The

most extreme tornadoes can attain wind speeds of more than 480 km/h (300 mph), stretch more than 3 km (2 mi) across, and stay on the ground for perhaps more than 100 km (60 mi).[86][87][88]

Cold-weather events

Blizzards

A blizzard in Maryland in 2009
Main article: Blizzard

Blizzards are severe winter storms characterized by heavy snow and strong winds. When high winds stir up snow that has already fallen, it is known as a ground blizzard. Blizzards can impact local economic activities, especially in regions where snowfall is rare. The Great Blizzard of 1888 affected the United States, when many tons of wheat crops were destroyed. In Asia, the 1972 Iran blizzard and the 2008 Afghanistan blizzard, were the deadliest blizzards in history; in the former, an area the size of Wisconsin was entirely buried in snow. The 1993 Superstorm originated in the Gulf of Mexico and traveled north, causing damage in 26 American states as well as in Canada and leading to more than 300 deaths.[89]

Hailstorms

A large hailstone, about 6 cm (2+1⁄2 in) in diameter
Main article: Hail
See also: List of costly or deadly hailstorms

Hail is precipitation in the form of ice that does not melt before it hits the ground. Hailstorms are produced by thunderstorms. Hailstones usually measure between 5 and 150 mm (1⁄4 and 6 in) in diameter. These can damage the location in which they fall. Hailstorms can be especially devastating to farm fields, ruining crops and damaging equipment. A particularly damaging hailstorm hit Munich, Germany, on July 12, 1984, causing about $2 billion in insurance claims.

Ice storms

Main article: Ice storm

An ice storm is a type of winter storm characterized by freezing rain. The U.S. National Weather Service defines an ice storm as a storm which results in the accumulation of at least 1⁄4 inch (6.35 mm) of ice on exposed surfaces.

Cold waves

Main article: Cold wave

A cold wave, known in some regions as a cold snap or cold spell, is a weather phenomenon that is distinguished by a cooling of the air. Specifically, as used by the U.S. National Weather Service, a cold wave is a rapid fall in temperature within a 24-hour period, requiring substantially increased protection to agriculture, industry, commerce and social activities. The precise criterion for a cold wave is determined by the rate at which the temperature falls and the minimum to which it falls. This minimum temperature is dependent on the geographical region and time of year.

Multi-hazard analysis

Each of the natural hazard types outlined above have very different characteristics, in terms of the spatial and temporal scales they influence, hazard frequency and return period, and measures of intensity and impact. These complexities result in "single-hazard" assessments being commonplace, where the hazard potential from one particular hazard type is constrained. In these examples, hazards are often treated as isolated or independent. An alternative is a "multi-hazard" approach which seeks to identify all possible natural hazards and their interactions or interrelationships.[90][91]

Many examples exist of one natural hazard triggering or increasing the probability of one or more other natural hazards. For example, an

landslides, whereas a wildfire may increase the probability of landslides being generated in the future.[91] A detailed review of such interactions across 21 natural hazards identified 90 possible interactions, of varying likelihood and spatial importance.[91] There may also be interactions between these natural hazards and anthropic processes.[92] For example, groundwater abstraction may trigger groundwater-related subsidence.[93]

Effective hazard analysis in any given area (e.g., for the purposes of disaster risk reduction) should ideally include an examination of all relevant hazards and their interactions. To be of most use for risk reduction, hazard analysis should be extended to risk assessment wherein the vulnerability of the built environment to each of the hazards is taken into account. This step is well developed for seismic risk, where the possible effect of future earthquakes on structures and infrastructure is assessed, as well as for risk from extreme wind and to a lesser extent flood risk. For other types of natural hazard the calculation of risk is more challenging, principally because of the lack of functions linking the intensity of a hazard and the probability of different levels of damage (fragility curves).[94]

Responses

Main articles: Disaster response and Emergency management

Disaster management is a main function of civil protection (or civil defence) authorities. It should address all four of the phases of disasters: mitigation and prevention, disaster response, recovery and preparedness.

Haiti earthquake damage

Mitigation and prevention

This section is an excerpt from Emergency management § Mitigation strategy.[edit]
Preventive or mitigation measures vary for different types of disasters. In earthquake prone areas, these preventive measures might include structural changes such as the installation of an
generator ensures continuation of electrical service. The construction of storm cellars and fallout shelters
are further examples of personal mitigative actions.

Disaster risk reduction

This section is an excerpt from Disaster risk reduction.[edit]
climate hazards, DRR and climate change adaptation are often looked at together in development efforts.[97]

Most sectors of development and humanitarian work have potential for DRR initiatives to be included. People from local communities, agencies or federal governments can all propose DRR strategies. Policies for DRR intend to "define goals and objectives across different timescales and with concrete targets, indicators and time frames."[96]: 16 

There are some challenges for successful DRR. Local communities and organisations should be actively involved in the planning process. The role and funding of local government needs to be considered. Also, DRR strategies should be mindful of gender aspects. For example, studies have shown that women and girls are disproportionately impacted by disasters.[98] A gender-sensitive approach would identify how disasters affect men, women, boys and girls differently. It would shape policy that addresses people's specific vulnerabilities and needs.[99]

The Sendai Framework for Disaster Risk Reduction is an international initiative that has helped 123 countries adopt both federal and local DRR strategies (as of 2022).[100] The International Day for Disaster Risk Reduction, on October 13 every year, has helped increase the visibility of DRR. It aims to promote a culture of prevention.

Spending on DRR is difficult to quantify for many countries. Global estimates of costs are therefore not available. However an indication of the costs for developing countries is given by the $215 - US$387 billion per year (up to 2030) estimated costs for climate adaptation. DRR and climate adaptation share similar goals and strategies. They both require increased finance to address rising climate risks.[101]: 49 

DRR activities are part of the national strategies and budget planning in most countries. However the priorities for DRR are often lower than for other development priorities. This has an impact on public sector budget allocations. For many countries, less than 1% of the national budget is available for DRR activities.[101]: 51  The Global Facility for Disaster Reduction and Recovery (GFDRR) is a multi-donor partnership to support developing countries in managing the interconnected risks of natural hazards and climate hazards. Between 2007 and 2022, GFDRR provided $890 million in technical assistance, analytics, and capacity building support to more than 157 countries.[101]: 54 

Response

This section is an excerpt from Disaster response.[edit]
Disaster response refers to the actions taken directly before, during or in the immediate aftermath of a disaster. The objective is to save lives, ensure health and safety and to meet the subsistence needs of the people affected.[102]: 16  This includes warning/evacuation, search and rescue, providing immediate assistance, assessing damage, continuing assistance and the immediate restoration or construction of infrastructure (i.e. provisional storm drains or diversion dams). The aim of emergency response is to provide immediate assistance to maintain life, improve health and support the morale of the affected population. Such assistance may range from providing specific but limited aid, such as assisting refugees with transport, temporary shelter, and food to establishing semi-permanent settlements in camps and other locations. It also may involve initial repairs to damage or diversion to infrastructure.

Recovery

Driving through flash flood
This section is an excerpt from Emergency management § Recovery.[edit]

The recovery phase starts after the immediate threat to human life has subsided. The immediate goal of the recovery phase is to bring the affected area back to normalcy as quickly as possible. During reconstruction, it is recommended to consider the location or construction material of the property.[103]

The most extreme home confinement scenarios include war,
dried milk, corn, and cooking oil.[104] Vegetables, fruits, spices and meats, both prepared and fresh-gardened, are included when possible.[105]

Preparedness

This section is an excerpt from Emergency management § Preparedness.[edit]
Preparedness focuses on preparing equipment and procedures for use when a disaster occurs. The equipment and procedures can be used to reduce vulnerability to disaster, to mitigate the impacts of a disaster, or to respond more efficiently in an emergency. The US Federal Emergency Management Agency (FEMA) proposed out a basic four-stage vision of preparedness flowing from mitigation to preparedness to response to recovery and back to mitigation in a circular planning process.[106] This circular, overlapping model has been modified by other agencies, taught in emergency classes, and discussed in academic papers.[107]

Society and culture

International law

The United Nations Office for the Coordination of Humanitarian Affairs was formed by General Assembly Resolution 44/182.

Under the Convention on the Rights of Persons with Disabilities, "States Parties shall take, in accordance with their obligations under international law, including international humanitarian law and international human rights law, all necessary measures to ensure the protection and safety of persons with disabilities in situations of risk, including situations of armed conflict, humanitarian emergencies and the occurrence of natural disasters."[108] The 1998 UN Guiding Principles on Internal Displacement and 2009 Kampala Convention also protect people displaced due to natural disasters.[109][110]

See also

References

  1. ^ a b c d "Natural Hazards | National Risk Index". hazards.fema.gov. Retrieved 2022-06-08.
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External links

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