Severe flash flooding across the tri-state area on Monday caused subway delays and road closures across the Big Apple and pushed New Jersey to declare a state of emergency. All five boroughs and Nassau County are under a flash flood warning through midnight.

Heavy rainfall flooded portions of New York and New Jersey, with videos on social media showing a subway station inundated with floodwaters.

Authorities say two people in New Jersey were killed after their vehicle was swept up in floodwaters during a storm that moved across the U.S. Northeast overnight.