What is a flash flood?

Question

What is a flash flood? How does it happen? Can it happen anytime, or do certain things have to happen first?

Answer 1

A flash flood is a flood that results from high intensity rainfall in a short period of time. The ground does not have enough time to absorb the water, which causes it gather above the ground and raise rivers and streams up considerably. This can happen at any time as long as the rainfall intensity is high enough. Its more likely to happen when the ground has already received too much rain and a severe thunderstorm suddenly arrives and dumps a lot of rain quickly.

Answer 2

A flash flood is sudden flooding that occurs when floodwaters rise rapidly with no warning within several hours of intense rain. They often occur after intense rainfall from slow moving thunderstorms. In narrow canyons and valleys, floodwaters flow faster than on flatter ground and can be quite destructive.

But flash floods can develop quickly, sometimes in just a few minutes and without any visible signs of rain

Answer 3

a sudden burst of down-pouring rain that quickly transforms into a flood.

Answer 4

a flood that comes with out warning.