Firefighters monitor a backfire as they battle the Valley Fire on Sunday, near Middletown, Calif. The fast-moving fire has consumed 50,000 acres after growing 40,000 acres in 12 hours. Stephen Lam/Getty Images hide caption

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Stephen Lam/Getty Images

Gov. Jerry Brown holds a chart showing California's average precipitation as he declares a drought state of emergency for the state Friday. Brown asked residents to voluntarily reduce water usage by 20 percent. Justin Sullivan/Getty Images hide caption

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Justin Sullivan/Getty Images