flash flood

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flash flood A brief but powerful surge of water that flows either over a surface (‘sheet flood’) or down a normally dry stream channel (‘stream flood’). Usually it is caused by heavy convectional rainfall of short duration, and is typical of semi-arid and desert environments.

flash flood

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flash flood A brief but powerful surge of water either over a surface (‘sheet flood’) or down a normally dry stream channel (‘stream flood’). Usually it is caused by heavy convectional rainfall of short duration, and is typical of semi-arid and desert environments.

flash flood

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flash flood • n. a sudden local flood, typically due to heavy rain.