Any time a body of water rises to cover what is usually dry land.

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A flood occurs... Any time a body of water rises to cover what is usually dry land.

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Presentation transcript:

Any time a body of water rises to cover what is usually dry land. A flood occurs . . . Any time a body of water rises to cover what is usually dry land.

Causes of Floods Heavy rain Spring snowmelt Dam and levee failure Low absorption or no soil percolation

Factors Contributing to Flooding Rainfall intensity Rainfall duration Topography Soil conditions Ground cover

Flood Hazards Heavy rainfall exacerbates problems with runoff, absorption, and flood-control measures. Riverine flooding can potentially inundate a city or downstream areas when protection fails. In rocky areas, lack of absorption can cause flash flooding.

Flood Risks 4,000 communities and 100 million people are at risk. Damage increases with development in: Coastal areas. Floodplains.

Flood Preparations Know the flood risk for the area. Prepare a flood evacuation plan. Obtain flood insurance. Keep documents in a water-proof box. Check a portable radio for current information.

Protecting Property From Flooding Elevate furnace, water heater, and electric panel. Move furniture and other items to a higher level. Install check valves. Waterproof basements and walls.

If You Must Evacuate Do not walk, swim, or drive through flood waters. Stay off bridges over fast-moving water. Heed barricades. Keep away from waterways. Avoid storm drains and irrigation ditches.

After a Flood Stay out of flooded areas. Reserve the telephone for emergencies. Avoid driving, except in emergencies.