California's Governor has declared a state of emergency for SF's electrical infrastructure.

FRESNO, Calif. – California Gov. Jerry Brown declared a state of emergency for San Francisco late Friday after electrical infrastructure serving the city was damaged by a giant wildfire raging out of control on the western edge of Yosemite National Park.

The fire has damaged San Francisco city and county electrical equipment and poses an "imminent threat to critical infrastructure assets" of the San Francisco Public Utilities Commission, according to a news release.

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Two of three hydroelectric powerhouses in the area have been shut down because of the fire, the commission said, but the city has been able to make up the difference through buying power on the open market.

SF data centers should be making sure their back-up systems are ready to pick up the load if there is a brown-out.