Wildfire buring in and around Yosemite National Park rages out of control
The fierce wildfire burning in and around Yosemite National Park shows no signs of letting up and it's now threatening San Francisco's water supply and power grid.
The Rim Fire has burned through nearly 161-thousand acres so far and at last check, was only 20 percent contained. The dangerous inferno is still rated to have extreme "growth" potential as massive flames ignite rows of trees and dry brush.
The fire has inched near Yosemite National Park, growing to an area now roughly the size of Chicago.More than two dozen aircraft are being used to fight the fire because the steep terrain is making it nearly impossible to access some of the forest by land.