Nearly half of all flash flood fatalities are auto related. Be aware that roadways may not be intact under flood waters. Flash flooding occurs within 6 hours of the rain event. Flash flood waters can move at incredible speeds, uprooting trees, moving boulders, and destroying bridges and buildings. Occasionally, floating debris or ice can restrict the flow of water at natural or man-made obstructions.
Flash flooding can occur downstream when the ice or debris are suddenly released.
Look out for rapidly rising water. When driving look out for flooding at highway dips, bridges, and low areas. Remember - you may only have seconds to react when confronted with a flash flood. Get out of areas subject to flooding and head for higher ground. Avoid already flooded and high velocity flow areas.