Drought – is a natural, continuous, regional phenomenon that manifests itself as a temporary limitation of water availability (below average under certain natural conditions). In the interpretation of the law it is defined as a natural disaster (Act of 18 April 2002 on the state of natural disaster, uniform text: Journal of Laws of 2014, item 333).
Drought should be distinguished from water scarcity, which is the result of anthropogenic activity, i.e. the demand for water exceeds the available water resources. The overlap of drought and existing water shortages often result in extreme droughts as to their intensity and duration.
The idea of drought caries its four genetic types, namely atmospheric, soil (agricultural), hydrological and hydrogeological drought. These types of drought indicate subsequent stages of development of this phenomenon, and their course and processes of formation are shown in the pattern of propagation of droughts in the hydrological cycle
Drought is currently one of the major water-related hazards, and at the same time it is the most complex, as it concerns not only the decline in water availability but also the risk of negative social, economic and environmental impacts. (The description prepared on the basis of PPSS content for water regions)