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A flash flood is a sudden flood event caused by a hydrologic response of the drainage basin. Flash floods are normally strongly localized and associated with extreme showers or thunderstorm activity, when high rates of precipitation occur in a short period of time.
On July 4, 2001 a flash flood swept through the Bryn Gwyn holiday park near Bala, North Wales leaving up to 45,000 homes without power and moving caravans several hundred yards away
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66 percent of flood deaths occur in vehicles, and most happen when drivers make a single, fatal mistake trying to navigate through flood waters.
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Just 6 inches of rapidly moving flood water can knock a person down.
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A mere 2 feet of water can float a large vehicle even a bus.
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