Severe storms hammered parts of the tri-state area Monday afternoon into the late evening hours, flooding City subways, prompting dozens of water rescues and triggering a state of emergency in hard-hit parts of New Jersey.

The National Weather Service issued a heat advisory that includes Berks, Bucks, Chester, Delaware, Lehigh and Montgomery counties, as well as Mercer County in New Jersey.

With a hot and juicy atmosphere, torrential downpours and flash flooding are back in play for at least part of New Jersey late Wednesday.

Flash flood warnings were issued by the National Weather service Monday night as heavy storms rolled into the area. Flood warnings were issued for Morris, Warren, Bergen, Essex, Hunterdon, Hudson, Passaic, Middlesex, Somerset and Union Counties, according to the National Weather Service.

Wednesday night: A chance of showers and thunderstorms, mainly between 1 and 4 a.m. Mostly cloudy, with a low around 74. South wind around 5 mph. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Flood watches have been issued in NJ with high heat along with the humidity expected to rise. See timing, heat index values, rain forecast and more.

New Jersey is expected to miss the heaviest rainfall in the latest round of thunderstorms on Tuesday, but more flash flooding is possible.

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