Weeks of colossal snowfall have blanketed parts of California, with the region bracing for a powerful storm set to unleash a wave of torrential rain. As heavy rainfall creates dangerous conditions, here’s what you need to know about flooding.
This leads to runoff. Flooding generally occurs when intense rainfall occurs over a short period of time or when rainfall drops during a prolonged period.
Flash flooding is especially common in the western United States, which has recently endured a historic drought. Low lying areas may be dry one minute, and saturated the next.Unlike flash floods, floods occur when a body of water — like a river or lake — spills over the edges of its banks and inundates the surrounding area. Flooding, sometimes referred to as river flooding, is generally a long-term event that can last days to weeks.
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