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People wear masks while smoke from the Camp Fire fills the air in San Francisco, California, on Thursday, Nov. 15, 2018. The smoke from California’s deadliest fire is so thick that its blotting out the sun and lowering surface temperatures by as much as 10 degrees Fahrenheit (6 Celsius), according to the U.S. National Weather Service. (Photo: Michael Short/Bloomberg)

The smoke hovering over the San Francisco Bay Area got thicker on Friday, causing many workers to stay home, or leave the region entirely. Those who stay are stocking up on air purifiers and respirator masks.

The wildfire in nearby Butte County is the deadliest in California history. It’s sending an unprecedented amount of smoke into San Francisco and Silicon Valley to the south, where many of the largest technology companies employ tens of thousands.

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Jayleen R. Heft

Jayleen Heft is the digital content editor for PropertyCasualty360.com. Contact her at [email protected]

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