A pair of widespread power outages left thousands of customers without electricity Friday afternoon across San Francisco, according to Pacific Gas and Electric Co., with some traffic signals also knocked offline.
The outages came as San Francisco experienced record-breaking heat. Downtown temperatures reached 90 degrees Friday, surpassing the previous March record of 87 degrees set in 2005, according to the National Weather Service.
The number of affected PG&E customers fluctuated throughout the afternoon as crews worked to restore service. The utility reported that more than 7,000 customers were without power.By about 6:15 p.m. on Friday, the company reported it had restored power to nearly all customers affected. They said an electrical equipment failure in an underground vault at 18th and Guerrero caused one outage and a failed cable in a separate location caused a second outage…