Flash flood

rapid flooding of geomorphic low-lying areas

A flash flood is very quick flooding of low-lying land, usually without prior warning. It may be caused by heavy rain or water from melted ice or snow. Flash floods can also happen after the collapse of a dam.[1] A tsunami causes similar problems but is not usually called a flash flood.


  1. "Definitions of flood and flash flood". National Weather Service. Retrieved 2008-08-19.