Severe Weather Safety

Floods and Flash Floods

Floods are the most common and widespread of all natural disasters. Most communities in the United States can experience some degree of flooding after spring rains, heavy thunderstorms or winter snow thaws.

Most floods develop slowly over a period of days; flash floods, however, are like walls of water that develop in a matter of minutes. Flash floods can be caused by intense storms or dam failure.

Facts about Floods

  • Flash floods and floods are the No. 1 cause of deaths associated with thunderstorms, more than 140 fatalities a year.
  • Most flash floods fatalities occur at night and most victims are people who become trapped in automobiles.
  • Sixty percent of all flood deaths result from people trying to cross flooded roads in vehicles when the moving water sweeps them away.
  • Six inches of fast-moving water can knock you off your feet; a depth of two feet will cause most vehicles to float.

Safety

  • When heavy rains threaten, monitor NOAA Weather Radio or your favorite news source for weather information.
  • If flooding occurs, get to higher ground.
  • Leave areas subject to flooding, such as dips, low spots and underpasses.
  • Avoid areas already flooded. Do not attempt to cross flowing streams. Never drive through flooded roadways.
  • If your vehicle is suddenly caught in rising water, leave it immediately and seek higher ground. Look for a floatation device.
  • Be especially cautious at night when it is harder to see flood danger.

Are You Ready for a Flood or Flash Flood (PDF, 158KB) – provided by American Red Cross, NOAA, and Federal Emergency Management Agency (FEMA).

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Sources: Douglas County Emergency Management, National Oceanic and Atmospheric Administration (NOAA), and Federal Emergency Management Agency (FEMA)