The Rim Fire in Yosemite spread to 110,000 acres overnight and threatened power lines and water systems serving the San Francisco area, causing California Governor Jerry Brown to declare a state of emergency. The fire, one of the most ferocious in California history, is just 2 percent contained and is spreading in two directions, threatening both power transmission lines and pumping stations that San Francisco depends on. On Thursday, the Rim Fire tripled in size, a rate of expansion that may be a record for large wildfires.
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