How do droughts develop and last for months or years?
Quick Answer
Drought develops when precipitation stays below normal for a long period, often combined with high temperatures and strong evaporation. Soil, rivers, and reservoirs then slowly run out of water.
The Full Story
Drought is not just the absence of rain for a few days; it is a prolonged period of moisture deficit. If a region receives less precipitation than usual and temperatures are high, evaporation from soil and water bodies increases, worsening the shortage. Drought can affect agriculture first, then streams, reservoirs, ecosystems, and groundwater. The exact definition varies by region, but meteorologists and hydrologists track rainfall, soil moisture, and water storage over time.
Key Facts
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