Flash flood means a sudden and destructive flooding to low-lying areas, often on sloping ground. It is usually caused by heavy rainfall and can be very powerful.
it is tough to give an exact definition so refer wikipedia
flash flood wall
How big can a flash flood be?
In 2007 in July Glouctestershire was hit by flash flood (a flash flood is a flood that happened really quick due to lots of rain)
flash flood
No there is no flash flood.
1 in August 17 1998 flash flood and 1 in March 2011 flash flood
That would be called a flash flood.
Flash flood means a sudden and destructive flooding to low-lying areas, often on sloping ground. It is usually caused by heavy rainfall and can be very powerful.
A flood timberland is a flash flood. A flash flood is the rapid flowing of low-lying areas such as rivers, basins, and dry lakes.
Flash flood - A flash flood is a sudden inundation of water in low-lying areas, usually brought on by heavy rain or a dam break
Flash flood comes and goes really quick. A flood takes longer and takes longer to go away.