Flooding is one of the most prevalent and devastating disasters in Nigerian cities. It happens every year in many states of Nigeria. And it has significant social and economic impacts. In 2010, approximately 1550 people died and 258,000 displaced by 19 flood events. In 2012, Nigeria experienced its worst flooding in recent history. Two million people were forced from their homes and 363 died. The same year, a monetary loss of approximately $6.5 billion in damages was recorded.
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Source: Phys.org