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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 ...

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. ... locations may be more prone to annual flooding or a flash flood from a ... This story does not necessarily represent the position of our parent ...

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 ...

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

Flooding occurs most commonly from heavy rainfall when natural watercourses do not have the capacity to convey excess water. However, floods are not always  ...

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 ...

www.livescience.com/23913-flood-facts.html

Oct 11, 2012 ... There are many different types and causes of flooding. ... Floods can affect any area to some degree; wherever rain falls, flooding can occur. ... There are a number of things you can do to prepare for a flood and minimize ...

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.

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

Flooding is a common natural disaster, and also very common in many places ... some effects of floods and what we can do before, during and after floods occur.

www.in.gov/dnr/water/files/watlinspsu99.pdf

Flash floods occur within a few minutes or hours of excessive rainfall, a dam or levee failure, or sudden release of water held by an ice jam. Flash floods can roll  ...