Severe weather can bring another destructive force besides tornadoes: flash floods! In the U.S., floods kill more people each year than tornadoes, hurricanes or lightning.
Flash floods are the most dangerous kind of floods, because they combine the destructive power of water with incredible speed and unpredictability.
Flash floods occur when excessive water fills normally dry creeks or river beds (along with currently flowing creeks and rivers) causing a rapid rise of water in a short amount of time. They can happen with little or no warning.