A flash flood is a rapid rise of water along a stream or in a low-lying urban area, the National 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.

Flash floods can start suddenly and become dangerous quickly. But there are steps you can take to protect yourself, both in the moment and well in advance.

Flash floods are occurring across the U.S., from Texas to New Jersey. Here's what you should know as risks escalate.

Heavy rainfall swept across North and Central Jersey July 14, leading to road closures, power outages and flash flooding.

Failing to translate flood forecasts into timely messages that tell people what they need to do to stay safe can have tragic consequences. In Texas and elsewhere, the solution is more wide-ranging than fixing any single channel of communication.

A flash-flood swept through parts of Galax and surrounding areas Friday night, turning quiet streets into rivers and prompting multiple water rescues.

At least two people died in New Jersey in flash flooding following the intense storms that hit the Tri-State area, according to officials.