Refinery fire in California
A fire at one of the country's largest refineries spewed thick black smoke over cities in the San Francisco Bay area, sending scores of residents to hospitals.
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Chevron Richmond Refinery
People watch smoke rise from the Chevron refinery in Richmond, Calif., from a vantage point in the El Cerrito, Calif., hills Monday, Aug. 6, 2012.
County health officials used automated calls to warn residents of Richmond, San Pablo and the unincorporated community of North Richmond to "shelter in place," meaning they should not only stay inside, but should also turn off heaters, air conditioners and fans, and to cover cracks around doors with tape or damp towels.
Credit: AP Photo/The Daily Republic, Brad Zweerink
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