Floods:
What is a flood?The dictionary definition for floods is: a great flowing or overflowing of water, especially over land not usually submerged.great flowing or overflowing of water, especially over land not usually submerged.
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Why are they so bad?They are so bad because they can destroy cities. even if you had a big city like Sydney, it can still be torn down in just a weeks time.
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How does a flood happen?Flooding occurs most commonly from heavy rainfall when natural watercourses do not have the capacity to convey excess water. However, floods are not always caused by heavy rainfall. They can result from other phenomena, particularly in coastal areas where inundation can be caused by a storm surge associated with a tropical cyclone, a tsunami or a high tide coinciding with higher than normal river levels. Dam failure, triggered for example by an earthquake, will result in flooding of the downstream area, even in dry weather conditions.
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