Forecasters warned more rain and flash flood risk is expected on July 15 after storms flooded out roads the day before.

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.

Additional dangerous flash flooding incidents are likely in the coming days as high humidity, daytime heat and storm systems interact from the Atlantic Seaboard to the Plains, Gulf coast and Southwest.

New Jersey is under a state of emergency after a flash flood caused at least two deaths in Plainfield and damage across Union County.

Flash floods are occurring across the U.S., from Texas to New Jersey. Here's what you should know as risks escalate.

Flooding can be deadly and often strikes with little or no warning. Streets, basements, and below-grade spaces can fill with water in minutes. If you live in a basement apartment or

Severe flash flooding struck New York City, Westchester County, Staten Island, and Rockland County, Bergen, Essex, Hudson, Passaic