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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Tourists and residents flee huge wildfire in Yosemite

Firefighters survey the flames in Yosemite National Park Credit: Reuters

A wildfire raging out of control has grown from 99 square miles to more than 165 square miles as it spread inside the border of Yosemite National Park in California.

The flames have also forced the evacuations of hundreds from homes in communities near the park.

California Department of Forestry and Fire Protection spokesman Daniel Berlant said the blaze was only two per cent contained.

Berlant said the fire threatens about 4,500 residences.

"Most of the fire activity is pushing to the east right into Yosemite," Berlant said.

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