The National Weather Service (NWS) issued its first ever flash flood emergency warning for New York City, as the remnants of Hurricane Ida brought heavy rain that flooded subway lines and streets in Manhattan, Brooklyn and New Jersey.

At least 14 people have been killed in the flooding in New York, New Jersey and Pennsylvania as basement apartments suddenly filled with water.

A New York City police spokesperson said a total of eight people died when they became trapped in flooded basements. Five people were found dead in an apartment complex in Elizabeth, New Jersey, the city’s mayor and spokesperson told local media.

Another death was reported in in New Jersey in the city of Passaic. The city’s mayor, Hector Lora, said a 70-year-old man was swept away. “His family was rescued, they were all in the same car. Unfortunately, the car was overtaken by the waters, and the firefighters who were being dragged down under the vehicle were unable to get him out,” Lora told WCBS-TV.

Officials outside of Philadelphia reported “multiple fatalities”, saying no additional details were immediately available.

The deaths in New York included a 50-year-old man, a 48-year-old woman and a two-year-old boy who were found unconscious and unresponsive late Wednesday inside a home. They were pronounced dead at the scene, police said.

New York’s FDR Drive, a major artery on the east side of Manhattan, and the Bronx River Parkway were under water by late Wednesday evening. Subway stations and tracks became so flooded that