Storms prompted flash flood warnings across the New York City metropolitan area Monday night, with photos showing severe flooding across the city and in parts of New York state and New Jersey.

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

Waters rushed into subway stations, making for hellish commutes, and the flash floods killed two people in New Jersey and caused a house to explode in New Jersey. Climate experts expect flooding to worsen and threaten already-struggling infrastructure throughout the region.

New York is cleaning up and trying to dry out after Monday night's torrential rains caused flash flooding and damage.

The state is now suing to restore $351 million in funding for projects aimed to upgrade drainage and protect public housing from flooding.

NYC could be in play for another heat wave this week, with the potential for more heavy rain, storms and flash flooding due to the hot and humid conditions.

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.

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