Power outage cripples San Francisco for hours

By Alexandria Sage and Noel RandewichSAN FRANCISCO (Reuters) - A power outage triggered by a fire in a utility substation blacked out much of San Francisco on Friday, paralyzing the city's technology and finance center, halting its famed cable cars and shuttering major retailers.The utility PG&E Corp reported a fire and a circuit-breaker failure at a San Francisco substation, with a series of outages hitting the Bay Area city shortly after 9 a.m. (noon ET/1600 GMT) and ultimately cutting pow