Amazon Tribes Stand Up for Their Survival loading...
Amazon Tribes Stand Up for Their Survival
The world’s fourth-largest dam will flood some of the land that indigenous tribes have lived on for centuries.
Geologic Evidence May Support Chinese Flood Legend loading...
Geologic Evidence May Support Chinese Flood Legend
A deluge that washed down the Yellow River nearly 4,000 years ago could be linked to the founding of China’s semi-mythical first dynasty.
About Flood

There are few places on Earth where people need not be concerned about flooding. Any place where rain falls is vulnerable, although rain is not the only impetus for flood.

A flood occurs when water overflows or inundates land that's normally dry. This can happen in a multitude of ways. Most common is when rivers or streams overflow their banks. Excessive rain, a ruptured dam or levee, rapid ice melting in the mountains, or even an unfortunately placed beaver dam can overwhelm a river and send it spreading over the adjacent land, called a floodplain. Coastal flooding occurs when a large storm or tsunami causes the sea to surge inland.

Most floods take hours or even days to develop, giving residents ample time to prepare or evacuate. Others generate quickly and with little warning. These flash floods can be extremely dangerous, instantly turning a babbling brook into a thundering wall of water and sweeping everything in its path downstream.


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