A flood is an overflow or accumulation of an expanse of water that submerges land. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Flooding may result from the volume of water within a body of water, such as a river or lake, which overflows or breaks levees, with the result that some of the water escapes its usual boundaries.
When heavy rain falls for several days, or even for several hours, flooding can result.
|On land||Earthquake • Volcanic eruption • Flood • Desertification (caused by drought) • Soil erosion|
|On water||Tsunami • High Waves • Tidal flood|
|On air||Hurricane • Tornadoes • Storm|
|Caused by human||Desertification • Global warming • Flood • Ozone depletion • Pollution|
|Controlling||Flood control • Sorting out the greenhouse problems • Desert control • Reafforestation|