A potentially severe line of storms forced officials to post flash flood and thunderstorm warnings from Connecticut down to the Jersey Shore.
Forecasters warn of potentially damaging winds, flash floods and isolated tornadoes before the Tri-State area endures yet another heat wave Tuesday.
Severe thunderstorm warnings were in effect for Manhattan, Queens, the Bronx, Long Island, Westchester and Rockland counties in New York, as well as most of northern New Jersey and Connecticut's Fairfield County.
Flash flood warnings were in effect in Manhattan, the Bronx, Long Island, Westchester, Bergen and Fairfield counties.
The rough weather was expected to linger through 10 p.m. when New York's statewide severe thunderstorm watch expires.
Parts of Bergen and Westchester counties had already been doused with up to 5 inches of rain by mid-Monday afternoon.
Motorists were advised to stay off the roads if possible and avoid flood waters. Several area roads were closed and high water rescues were underway in multiple locations.