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A drought is a period of abnormally dry weather that persists long enough to produce a serious hydrologic imbalance, causing, for example, crop damage and shortages in the water supply. The severity of a drought depends on the degree of moisture deficiency, the duration, and the size of the affected area. Drought can be defined four ways:
Meteorological Drought―when an area gets less precipitation than normal. Due to climatic differences, what is considered a drought in one location may not be a drought in another location.