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NEW YORK — Watch out for wet weather!

A flash flood warning and a severe thunderstorm warning were issued for parts of New York and New Jersey on Sunday night.

“If you come across a flooded street, turn around. Do not drive, walk, or bike through the water,” the New York City Office of Emergency Management tweeted.

There could be winds up to 60 mph and quarter-sized hail, according to the National Weather Service.

The area under the flash flood warning on Aug. 18, 2019 is shown above. (National Weather Service)

The flash flood warning, which is in place for parts of Manhattan, the Bronx, New Jersey and the northern suburbs of New York City, is in place until 7:30 p.m.

“We’re seeing some extreme weather, New York City, the mayor’s office tweeted. “Please exercise caution and stay indoors if possible.”

Thunderstorms are forecast through Thursday.

The combination of the high temperature and high humidity will send the heat index up to 95-100 through the first half of the week.

Nights are not likely to drop below 75. As for thunderstorms, any little trigger will set them off. With so much moisture in this airmass, the potential for flooding downpours will exist with any one.

We should be able to end this tropical heat late in the week as a cold front moves through Wednesday night. Thursday will start out muggy, but the humidity should be dropping through the day. By Friday, the temperature and humidity should be back down to a seasonable, comfortable level and it could last right into next weekend.