A flood is a large flow of water over dry land, especially one that causes loss or damage. A flood can cause deaths, destroy buildings, and other property, wash rich soil into the sea and spread harmful sediments. How the Problem Occurs When swollen rivers burst their banks a flood occurs. Storm surges cause flooding in lowland areas, and heavy rainfall during a monsoon sea also causes a flood. So much damage is caused because people build their homes so close to the ocean, lakes, and rivers.
Farmers sometimes build near a water source, so when it floods their good rich soil is washed away.
The solution to a flood is live where there is no danger of flooding. Build dams, reserviors, leeves, and other engineering things. I found my information in these books, The Knowledge Factory A Lot of Facts About A Lot of Things, Compton's Encyclopedia Volume 8, New Standard Encyclopedia FG, and the following links.