Environment of New York City

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Feral pigeons on the Empire State Building

The environment of New York City consists of many interwoven ecosystems as part of the

population of New York City numbered 8.8 million human beings.[3]

Climate

Flooded South Ferry/Whitehall Street station in Manhattan during Hurricane Sandy

The climate of New York City features a humid subtropical variety, with parts of the city transitioning into a humid continental climate, giving the city cool, wet winters and hot, humid summers with plentiful rainfall all year round.[4]

In September 1821, a

Franklin D. Roosevelt East River Drive required rescue.[8][9] The 1992 storm was surpassed by former Hurricane Sandy in October 2012, which rose water levels to 14.06 ft (4.29 m) above the average low tide. Floodwaters covered about 17% of New York City, imparting about $19 billion in damage, including $5 billion to transportation infrastructure. The floods affected the homes of more than 443,000 people and more than 23,400 businesses. There were 43 deaths in the city related to Sandy.[10][11] In September 2021, former Hurricane Ida set a rainfall record when it dropped 3.15 inches (8.0 cm) of precipitation in one hour.[12] The storm killed 13 people in the city, several of them due to drowning in basement apartments. Floods also shut down roads and the subway.[13]

The hottest day on record in the city was July 9, 1936, when Central Park recorded a high temperature of 106 °F (41 °C).[14] A heat wave in August 1896 killed 1,500 people in the city.[15] The coldest day on record was February 9, 1934, with a temperature of −15 °F (−26 °C).[16] In March 1888, a blizzard dropped 21 in (530 mm) of snowfall, killing 200 people across the city.[17] A tropical storm in 1882 dropped 8.28 in (210 mm) of rainfall on September 23, which was the wettest calendar day on record, going back to 1869.[18][19] A January 2016 blizzard dropped 30.5 in (77 cm) of snowfall at JFK airport, the highest amount recorded from a single storm.[20] There have been at least 12 tornadoes in the city since 1974.[21]

Ecosystems

As New York City grew into a city, the surrounding environment was altered by the growing demands of the human population. The ecosystem of New York City is consistently maintained to support a growing population in the city. In the last 400 years since the original ecological systems as researched by the Mannahatta Project, the growth and development of the New York City water supply system, the New York City waste management system, Transportation in New York City, and Food and water in New York City has greatly altered the environment of New York City.

In 2017, CCNY entomologist and Professor of Biology David Lohman discovered a new species of fly living in Central Park.[22] The fly, Themira lohmanus, has evolved to only breed on duck dung.[22]

Pollution

Photograph of skyscrapers seen from a great height, surrounded by smog. Unlike the previous photo of the 1966 smog, no horizon can be seen as the entire sky is blotted out by the smog. If the prior photo's vantage point seems to be "above" a blanket of smog, this photo is completely underneath and within it.
A view toward the Chrysler Building from the Empire State Building during a six-day smog in November 1953, estimated to have caused at least 200 deaths.[23]