1 drought It is a period of dry weather. It is especially injurious to crops.
2 tsunami It is an unusually large sea wave. It generally happens because of a seaquake or
undersea volcanic eruption.
3 tornado It is a destructive windstorm over land.
4 flood It is an overflowing of water onto land.
5 avalanche It is a large mass of snow. It suddenly slides or falls.
6 earthquake It is a sudden movement of the Earth's crust.
7 deforestation It is the act of cutting down and clearing away the trees or forests.