Every state is at risk from this hazard.Ī tsunami is a sea wave generated by an earthquake, landslide, volcanic eruption, or even by a large meteor hitting the ocean. Even very small streams, gullies, creeks, culverts, dry streambeds, or low-lying ground that appear harmless in dry weatherĬan flood. Producing effects similar to flash floods.īe aware of flood hazards no matter where you live, but especially if you live in a low-lying area, near water or downstream fromĪ dam. Flooding can also occur when a dam breaks, River or stream, such as when a levee is breached, but still can be destructive. Overland flooding occurs outside a defined That carries rocks, mud, and other debris and can sweep away most things in its path. Flash floods often have a dangerous wall of roaring water Sometimes in just a few minutes and without any visible signs of rain. Some floods develop slowly, sometimes over a period of days. Floods are one of the most common hazards in the United States.įlood effects can be local, impacting a neighborhood or community, or very large, affecting entire river basins and multiple states.
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