causesEach time there are more rains than the drainage system can take, there can be floods. Also,rivers can overflow their banks to cause flooding. Sea water can be carried by massive winds and hurricanes onto dry coastal lands to cause flooding, too!Dams are man-made blocks mounted to hold water flowing down from a highland. The power in the water is used to turn propellers to generate electricity. Sometimes, too much water held up in the dam can cause it to break and overflow the area.
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