A Flood is a body of water temporarily covering what is normally dry land. Floods most commonly occur along rivers. In addition, they can occur around lakes, wetlands, and seacoasts. Floods occur naturally and can benefit certain ecosystems. However, human activities can change the frequency and severity of floods, contributing to destruction. In developed areas, floods can cause great damage to property. Floods consistently rank among the costliest natural disasters around the world. They cause billions of dollars in damage each year.
Source: World Book Online, 2014.
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