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Flash flood

Flash flooding is rapid flooding of low-lying areas, rivers and creeks that is caused by the intense rainfall associated with a thunderstorm. Flash flooding occurs when the ground under a storm becomes saturated with water so quickly that it cannot be absorbed. The runoff collects in low lying areas and flows rapidly downhill. As a result, anything in its path is suddenly in rising water. These most often occur in dry areas that have recently received precipitation, but the flash flood can flow for a long distance as long as there is a path downhill.



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