BART

Rare heat wave bakes San Francisco; fires rage through West

Vineyards moved their wine harvest to the cool of night and transit trains slowed for fear that some of the hottest weather in San Francisco Bay Area history would warp rails Saturday, as stifling temperatures and the smoky pall of wildfires marked an unofficial end to summer across the U.S. West.

In Los Angeles, a wildfire just north of downtown had grown to the largest in city history, Mayor Eric Garcetti said. Three structures had burned, at least two of them homes, but fire officials said they were confident they could tame the blaze unless winds picked up.

Wildfires also entered a 2,700-year-old grove of giant sequoia trees near Yosemite National Park and have driven...

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