Many natural disasters are related to the weather. ____ happen after heavy rains or when snow ____ too fast. ____ are serious tropical storms that gather heat and energy from the oceans. ____ come from violent thunderstorms and they are rotating, funnel shaped clouds. Tsunamis are extremely large waves caused, for example, by ____. Thunderstorms are very dangerous as well; ____ kills several people every year. In some parts of the world winter storms, ____ and heavy ____ cause natural disasters.

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