Bài (23-30)
Drought is a condition that becomes when the average rainfall for a fertile area drops far below the normal amount for a long period of time.In areas which are not irrigated,the lack of rain causes farm crops to wither and dead. Higher than normal temperatures usually accompany periods of drought. They add to the crop damage.Forest fires start easily during drought.The soil of a drought area becomes dry and crumbles.Often the rich topsoild is blown away by the hot,dry winds. Streams,ponds,and wells often dry up during a drought,and animal suffer and may even die because of the lack of water