A flash flood warning was in effect in New York City until 9:45 p.m., and New Jersey Gov. Phil Murphy declared a state of emergency. Middlesex, Morris and Somerset counties remained under a flood warning until 7:15 a.m. Tuesday.

The heavy downpours wreaked havoc across the city with footage showing commuters overwhelmed by floodwaters in various subway stations.

Following severe flash flooding on the East Coast, transport infrastructure in New York has been hit with travel disruption. New York City and New Jersey declared a state of emergency after heavy rainfall soaked the Northeast coast,

Flooding caused delays on multiple New York City subway lines Monday as torrential rain pummeled the Tri-State Area.

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.

On Monday at 5:10 p.m. the National Weather Service released an updated flash flood warning in effect until 7 p.m. for Bergen County.

The heaviest rainfall and the most widespread thunderstorms are expected to develop from Northern Virginia through southern New England in the afternoon. The Weather Prediction Center has issued a “moderate” (Level 3 out of 4) risk for flash flooding in that corridor through Tuesday morning.

The National Weather Service has expanded a warning for potential 'life threatening' flooding in NY to include Rockland and central .