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Drought Classification

The Drought Monitor identifies general areas of drought and labels them by intensity. Learn how to interpret the map.

Drought Severity and Coverage Index

The Drought Severity and Coverage Index expresses U.S. Drought Monitor status for an area as a single numeric value.

Statistics Explanation

We compute statistics by area and by population, either categorically or cumulatively. Learn more.

Population Statistics

Population statistics are approximate. Read detail.