Fig. 4From: Classification of drought severity in contiguous USA during the past 21 years using fractal geometryContinental US (CONUS) Percent Area in US Drought Monitor Categories database (2000–present), the drought status of areas represented by points; Source(s): National Drought Mitigation Center (NDMC), the US Department of Agriculture (USDA), and the National Oceanic and Atmospheric Administration (NOAA), https://droughtmonitor.unl.edu/DmData/TimeSeries.aspxBack to article page