Floods Notes -Reasons of Floods In India -A flood is an overflow of water on land. Sometimes a river might receive extra water, either from heavy rains or other natural disasters. When this happens, the water overflows from its normal path in the river bed and onto the dry land. This is called a flood. Flash floods happen quickly. Extreme flooding can also be caused by a tsunami or a large storm that will cause the sea to surge inland. The most deadly flood was in 1931 in China and it had killed about 2,500,000 people.
During a flood, people should move themselves and their most precious belongings to higher ground quickly. The process of leaving homes in search of a safe place is called evacuation. Floods occur at irregular intervals and vary in size, duration and the affected area.