Northern California fire brings worst air quality in the world to residents hundreds of miles away

Smoke from the Camp fire — California’s deadliest wildfire in recorded history — has poured into communities hundreds of miles away, filling the sky with dangerous particles, grayish hues and a bitter odor. The smoke has also dropped temperatures as much as 10 degrees because the haze is blotting out the sun.

It also has led to dangerous and unhealthy air quality.

Since the blaze broke out last week, communities in the Sacramento Valley and Bay Area — including Chico, Oroville and Sacramento — have had some of the dirtiest air in the world, according to Purple Air, an air-quality monitoring network.

Berkeley Earth, a nonprofit that tracks air-quality data, said Friday that San Francisco, Stockton and Sacramento ranked as the world’s three most polluted cities.

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