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.

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.

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.

Over half of U.S. flood deaths happen on roads, a risk that's growing as a warmer climate fuels intense rain. Texas, home to "Flash Flood Alley," is using high- and low-tech ways to keep people safe.

Emergency officials encourage people to “learn and practice evacuation routes, shelter plans and flash flood responses,” in case they need to get to higher ground quickly.

Flood safety tips: How to survive flash floods. Skip to content. All Sections. Subscribe Now. 78°F. Thursday, July 17th 2025 ... Emergency workers will be assisting people in flooded areas.