A flood watch has also been issued in Washington, D.C., while the Midwest also has the potential for flooding.

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

Another day of pop-up thunderstorms is expected for the tri-state area Thursday, this one potentially more widespread than the isolated cell that turned deadly in New Jersey a day ago. Any storms that do develop,

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

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

Heavy rain swept across parts of the Northeast on Monday night, inundating sections of New York and New Jersey with flash flooding that stranded vehicles in roadways and closed subway lines.

New Jersey's governor declared a state of emergency after heavy rains pounded the Northeast. New York City also warned residents of basement apartments to prepare for possible evacuations.

Much of the U.S., including North Carolina, has experienced a significant increase in intense rainfall and widespread flooding throughout July, often unrelated to tropical systems and impacting areas outside designated floodplains.

Another round of showers and thunderstorms is slowly moving across the Mid-Atlantic Tuesday evening, after intense rain set off dangerous flash flooding from Virginia to New York on Monday, leaving at least two dead and prompting dozens of rescues as water overwhelmed roads and subways.