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Yosemite fire 'size of Chicago'

A wildfire in Yosemite National Park in the US state of California has spread to almost 150,000 acres, according to fire service officials. A state of emergency has been declared for San Francisco after power lines servicing the city were threatened.

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Yosemite wildfire damages San Francisco power lines

The wildfire raging around the edge of Yosemite National Park is threatening key electricity lines serving San Francisco. The fire has damaged the electrical infrastructure serving the city, and forced the some power lines to shut down. There have been no reports of electricity blackouts, so far.

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