A flood is an overflow of water on normally dry ground. This is most commonly due to an overflowing river, a dam break, snowmelt, or heavy rainfall. Less commonly happening are tsunamis, storm surge, or coastal flooding. The most deadly flooding was in 1931 in China and killed between 2,000,000 and 4,000,000 people.
The most flood-prone area in the world is Asia, but the US has its own share of floods. Flood is the most regularly occurring and the most destructive natural disaster. Essay Subjects.