More than 25 percent of the West is in an exceptional drought, which is the most severe category used by the US Drought Monitor.
Mandatory Credit: US Drought Monitor/CNN
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The West's historic drought in 3 maps
An unprecedented, multi-year drought continues to worsen in the West amid a period of record heat and dryness, which scientists say is a clear sign of how the climate crisis is affecting not only the weather, but water supply, food production and electricity generation.
