A flash flood is a rapid rise of water along a stream or in a low-lying urban area, the weather service said. Flash flooding can result from slow-moving thunderstorms, from numerous thunderstorms that develop repeatedly over the same area, or from heavy rains associated with tropical cyclones.

More than 100 people have died across six counties after flash flooding from heavy rain began affecting the state last week.

As the remnants of Tropical Storm Chantal stream northward into the Tri-State Area, major weather changes are in store after a near-perfect Fourth of July weekend in New York, New Jersey and Connecticut.