Flash flood - Wikipedia, the free encyclopedia
A flash flood is a rapid flooding of geomorphic low-lying areas - washes, rivers and streams. It is caused by heavy rain associated with a thunderstorm, hurricane, or tropical storm. Flash floods ca...
en.wikipedia.org/wiki/Flash_flood
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.
www.fema.gov/hazard/flood/index.shtm www.fema.gov/hazard/flood/index.shtm
Flooding happens during heavy rains, when rivers overflow, when ocean waves come onshore, when snow melts too fast or when dams or levees break. Flooding may be only Floods that happen very quickly are called flashfloods. Flooding is the most common of all natural hazards. It can happen in every U.S. state and territory.
www.fema.gov/kids/floods.htm www.fema.gov/kids/floods.htm
And flash floods are the most dangerous kind of floods, because they combine the destructive power of a flood with incredible speed and unpredictability. Learn more about the force of flash floods when you read through this lesson.
weathereye.kgan.com/cadet/flood/index.html weathereye.kgan.com/cadet/flood/index.html
Information on Floods may now be found at the NOAAWatch Floods theme page. ... Privacy Policy | FOIA | Information Quality | Disclaimer | USA.gov | Ready.gov | Site Map | Contact Webmaster...
www.noaa.gov/floods.html www.noaa.gov/floods.html
How do flash floods occur? ... Flash floods occur within a few minutes or hours of excessive rainfall, a dam or levee failure, or a sudden release of water held by an ice jam. Flash floods can roll boulders, tear out trees, destroy buildings and bridges, and scour out new channels.
www.nws.noaa.gov/om/brochures/ffbro.htm
Flash floods are the number one weather-related killer in the United States. ... Low Visibility- Heavy rains can reduce visibility to zero. Many flash floods occur at night making it hard to see the danger.
www.ci.austin.tx.us/watershed/flashflood.htm www.ci.austin.tx.us/watershed/flashflood.htm
What causes flash floods and the floods that took place this summer in Poland? ... Flash floods are floods that happen very suddenly and with little warning. They are very dangerous. A very heavy rain or an accident like a dam break can cause one. Sometimes the ground is too hard or too wet to soak up water.
www.windows.ucar.edu/tour/link=/kids_space/flood.html www.windows.ucar.edu/tour/link=/kids_space/flood.html
Floods are among the most frequent and costly natural disasters. Conditions that cause floods include heavy or steady rain for several hours or days that saturates the ground. Flash floods occur suddenly due to rapidly rising water along a stream or low­lying area.
www.redcross.org/portal/site/en/menuitem.86f46a12f38229... www.redcross.org/portal/site/en/menuitem.86f46a12f382290517a8f210b80f78a0/?vgnextoid=fdb4510f935ea110VgnVCM10000030f3870aRCRD&vgnextfmt=default