what causes floods?!
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Whenever there are more rains than the drainage system can take, they can cause floods. Rivers can overflow their banks to cause a flood. This can happen when there is more water upstream than usual, and as it flows downstream to the adjacent low-lying areas there is a burst and water gets into the land.
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Increase in sea level by melting ice caps on polar regions, uneven rain, river and dam overflows are reasons of flood.
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