The San Francisco Fire Department said it started receiving 911 calls about the fire around 1:00 p.m. Saturday. By 6:00 p.m. they had extinguished the blaze and turned the building over to PG&E.
No injuries were reported and the cause of the fire is under investigation.
PG&E said the damage to the substation was “ significant and extensive” and that repairs would be complex.
Fire officials said it was unclear whether the fire was the “root cause” of the outages, with some losing power much earlier Saturday morning.
On Sunday, Sunset Supervisor Alan Wong called for a public hearing on the incident.
In a statement, Wong said that Sunset homes and businesses experienced outages earlier this month, prompting him to send PG&E a formal letter on Dec. 11 “requesting detailed information regarding the cause of the outages, how the disruptions escalated, and gaps in communication with the public.”
Wong said he has yet to receive a substantive reply.
San Francisco Supervisor Connie Chan said Sunday she, too, wants transparency.
“It’s a glaring example that illustrates a privatized company like PG&E keep[s] increasing our energy bill, and yet still be able to get away from the obligation [of] delivering reliable and safe power to a city like San Francisco,” Chan said.
PG&E did not immediately respond to a request for comment about the statements from Wong and Chan, but the company has apologized for the disruption caused by the outage.
The incident snarled traffic and transit throughout the city Saturday evening, leading to traffic jams, BART station closures and delays on public transportation. Waymo had halted operations across the Bay Area Saturday after its driverless taxis were seen stranded in city intersections amid the chaos. The driverless taxi company said Sunday evening operations had resumed.