SCGOV Storm Center
| Flooding: common
hazard, know your terms |
Floods are one of
the most common hazards in the United States. Flood effects can
be local, impacting a neighborhood or community, or very large,
affecting entire river basins and multiple states.
However, all floods are not alike. Some floods develop slowly,
sometimes over a period of days. But flash floods can develop
quickly, sometimes in just a few minutes and without any visible
signs of rain. Flash floods often have a dangerous wall of
roaring water that carries rocks, mud, and other debris and can
sweep away most things in its path. Overland flooding occurs
outside a defined river or stream, such as when a levee is
breached, but still can be destructive. Flooding can also occur
when a dam breaks, producing effects similar to flash floods.
Be aware of flood hazards no matter where you live, but
especially if you live in a low-lying area, near water or
downstream from a dam. Even very small streams, gullies, creeks,
culverts, dry streambeds, or low-lying ground that appear
harmless in dry weather can flood. Every state is at risk from
this hazard.
Familiarize yourself with these terms to help identify a flood
hazard:
Flood Watch:
Flooding is possible. Tune in to NOAA Weather Radio,
commercial radio, or television for information.
Flash Flood Watch:
Flash flooding is possible. Be prepared to move to higher
ground; listen to NOAA Weather Radio, commercial radio, or
television for information.
Flood Warning:
Flooding is occurring or will occur soon; if advised to
evacuate, do so immediately.
Flash Flood Warning:
A flash flood is occurring; seek higher ground on foot
immediately.
Source: FEMA |
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