New York was hit by severe thunderstorms and flash flooding on Friday, September 29, 2023, causing damage throughout the New York area. The storm shut down swaths of the subway system, flooded some streets and highways, and cut off access to at least one terminal at LaGuardia Airport. The storm unleashed more than eight inches of rain in parts of the New York metropolitan area from Thursday, September 28, into Friday night, leading to flooding. The storm was not a hurricane, but rather a severe thunderstorm. The storm was influenced by the climate crisis, which has made this type of storm up to 20% wetter.