Torrential rainfall in New York City caused flash flooding on Friday, leading to disruptions in subway services, flooding of ground-level apartments, and the formation of small lakes on some streets. The city experienced nearly eight inches of rain, with the possibility of a few more inches before the storm system moved away. Governor Kathy Hochul declared a state of emergency for New York City, Long Island, and the Hudson Valley. The flooding impacted the subway system and Metro North commuter rail service, resulting in suspended subway lines, closed stations, and slowed bus routes. Climate scientists relate the increase in extreme weather events to global warming.