Drought is an above-average lack of rainfall over a season, a year or several years.
Unlike more immediate disasters, a drought tightens its grip over time, gradually destroying an area. Severe droughts can last for many years, with the lack of water devastating agriculture and water supplies. Crops are often damaged or destroyed and families might lose access to clean drinking water.
This can lead to economic and social disasters, such as famine, malnutrition, epidemics and displacement of people.