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.

Multiple parts of Central Texas, including Kerr County, were shocked by flash floods Friday when the Guadalupe River rose rapidly.

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