Heavy Rain
Widespread torrential rains, often in excess of 10 inches, can produce destructive floods. This is a major threat to low lying areas that are prone to flooding. Rainfall is generally heaviest with slower moving storms (less than 10 mph).
The heavy rains will cause flooding particularly in low-lying areas, creeks, streams and road run-off areas. Compounded with debris that clogs drainage, roadways can remain flooded for many hours/days.
Never try to cross a flooded roadway. Flooded roads are subject to erosion and damage. While it may look perfectly safe, there could be hidden holes which will trap your car and you.