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天然原因

台风及季风

台风可为沿岸地区带来水灾。当有台风的时候，大气气压是相对较低的。因此，海平面会升高，从而间接地增加水灾的机会。

在1991年，曾有一台风吹袭孟加拉国国。该台风强达时速240公里，把海水拥向沿岸地方。当时的巨浪高达7.5米高，为沿岸地区带来水灾。

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