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.

Statewide, rain totals ranged from .11 inches in Hamilton, Mercer County to 6.64 inches in Clark and 6.24 inches in Westfield.

Parts of New York City and Northern New Jersey were inundated on Monday night as widespread thunderstorms moved through.

Just one day after a fast-moving storm swept through New Jersey, causing dramatic rescues, a home explosion, and multiple deaths, officials have issued both a Flood Watch and Heat Advisory for the region.

The National Weather Service issued a flood warning at 9:07 p.m. on Monday in effect until Tuesday at 12:15 a.m. for Bergen County.

Gov. Phil Murphy declared a state of emergency for New Jersey as considerable rain fell on July 14 with more expected as the night progresses.

A tornado warning is in effect until 9:15 p.m. in New Castle County, Delaware.

Forecasters say some thunderstorm cells have the potential to dump as much as 2 to 3 inches of rain in one hour, posing a risk of rapid flooding.