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Floods begin when soil and vegetation cannot absorb falling rain or melting snow, or when water runs off the land in such quantities that it cannot be carried in normal stream channels or retained in natural ponds and human-made reservoirs.

en.wikipedia.org/wiki/Flood

A flood is an overflow of water that submerges land that is usually dry. The European Union ... Flooding in a street of Natal, Rio Grande do Norte, Brazil in April 2013. ... Flooding may occur as an overflow of water from water bodies, such as a ...

www.nationalgeographic.com/environment/natural-disasters/floods

Floods are among Earth's most common–and most destructive–natural hazards. ... there is a one-percent chance that such a flood could happen in any given year . ... where flood mitigation and prediction is advanced, floods do about $6 billion ...

weather.com/safety/floods/news/how-floods-occur-20120423

Jul 8, 2013 ... Flooding and flashing flooding are not restricted to specific areas of the country. ... Subsequent flash flooding can occur downstream if the obstruction ... This story does not necessarily represent the position of our parent ...

www.ga.gov.au/scientific-topics/hazards/flood/basics/causes

Where do Floods occur? ... Flooding occurs most commonly from heavy rainfall when natural ... However, floods are not always caused by heavy rainfall.

eschooltoday.com/natural-disasters/floods/what-is-a-flood.html

When floods happen in an area that people live, the water carries along ... some effects of floods and what we can do before, during and after floods occur.

www.nssl.noaa.gov/education/svrwx101/floods

They can happen with little or no warning. Where and when do floods occur? Flooding occurs in every U.S. state and territory, and is a threat experienced ...

eschooltoday.com/natural-disasters/floods/what-causes-floods.html

How do hurricanes form ... Sometimes, there is heavy rain for a very short period that result in floods. ... Rivers can overflow their banks to cause flooding.

www.bbc.co.uk/schools/gcsebitesize/geography/water_rivers/river_flooding_management_rev1.shtml

A secondary school revision resource for GCSE Geography on causes and effect of flooding, includes case studies on Boscastle, Mozambique and Bangladesh.

www.ask.com/youtube?q=How+Do+Floods+Happen%3F&v=rAQu-3L-2VI
Aug 6, 2013 ... The animation, "Flooding: Why it happens and how we can help", has ... Your browser does not currently recognize any of the video formats ...