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A flash flood is a rapid flooding of low-lying areas: washes, rivers, dry lakes and depressions. It may be caused by heavy rain associated with a severe thunderstorm, hurricane, or tropical storm, or by meltwater from ice or snow flowing over ice sheets or snowfields. Flash floods may also occur after the collapse of a natural ice or debris dam ...
A flood is an overflow of water (or rarely other fluids) that submerges land that is usually dry. [1] In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are of significant concern in agriculture, civil engineering and public health.
A flash flood warning (SAME code: FFW) is a severe weather warning product of the National Weather Service that is issued by national weather forecasting agencies throughout the world to alert the public that a flash flood is imminent or occurring in the warned area. A flash flood is a sudden, violent flood after a heavy rain, or occasionally ...
The rain rate can exceed 2 inches per hour, which is enough to cause rapid, life-threatening flooding. The AccuWeather Local StormMax™ rainfall for Helene is 24 inches and may occur along the ...
"Dangerous conditions with a high risk of flash flooding, mudslides and other debris flows with washouts are likely." As of early Saturday local time, up to a foot of rain has fallen, with 6-10 ...
All of that rain could cause flash flooding, and eventually river flooding through the weekend and into next week, the National Weather Service said. Tropical Storm Helene is forecast to impact ...
July 24–August 27, 2022. Location. Greater St. Louis, Central Appalachia, Southern and Southwestern United States. Deaths. 44 deaths (Kentucky: 38 direct, 2 indirect; Missouri: 2; Texas: 1; Utah: 1) [1][2][3][4][5] Property damage. $1.2 billion (Kentucky and Missouri only) [6] Beginning on July 24, 2022, and lasting for a week, many flash ...
Damage. $65.9 million. Areas affected. Massachusetts, Rhode Island, Connecticut, New Jersey, Maryland. In a six-day period from September 8 to September 13, 2023, slow-moving thunderstorms associated with a low-pressure area caused flash flooding across multiple states across the Northeastern and Mid-Atlantic regions of the United States.
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