Flash floods happen suddenly, in a flash, with very little warning, sometimes being created in minutes while the storm is still overhead. They often begin in small streams, canyons, or dry river beds that just don’t have enough drainage. Because of how quickly they can begin, it’s difficult to predict flash floods, so you should always be aware of the following conditions that lead can to them:
- Flash floods only occur within six hours of rain.
- Look for news of dam or levee failures.
- Watch for slow-moving storms over the same area.
- Hurricanes are another big source of intense rain.
- If you see water pooling on the ground, this is a sign of oversaturation.
- Be aware of a “flood watch” or “flood warning” from the National Weather Service.
A flood watch is issued when conditions are favorable for flooding. It does not necessarily mean that flooding will occur. A flood warning is issued when flooding is imminent or occurring. Seek safety immediately.
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