Global Risk Data Platform
Drought is a phenomenon that affects more people globally than any other natural hazard. Unlike aridity, which refers to a semi-permanent condition of low precipitation (desert regions), drought results from the accumulated effect of deficient precipitation over a prolonged period of time. Here “deficient” refers to values being less than the expected, or long-term average value at a particular location. Ultimately, drought refers to a condition of an insufficient supply of water necessary to meet demand, both being highly location-specific.