• A major power outage affected 130,000 customers in San Francisco.
• The blackout was linked to a fire at a PG&E substation.
• Transportation services, including BART and Muni, faced significant disruptions.
• Residents were advised to avoid nonessential travel during the outage.
• Power restoration timelines remain unclear, though PG&E reports stabilization.

A significant power outage struck San Francisco, leaving around 130,000 customers without electricity, which accounts for roughly one-third of Pacific Gas and Electric Co.'s (PG&E) customers in the city. The outage began early Saturday afternoon, primarily affecting neighborhoods such as Richmond, Presidio, and areas around Golden Gate Park, according to HuffPost, LA Times, and AA.

The incident was exacerbated by a fire that broke out inside a PG&E substation near 8th and Mission streets around 3:15 PM, although PG&E has not confirmed the exact cause of the blackout. Fire officials indicated that the blaze was a likely contributing factor to the outages, as reported by LA Times and HuffPost.

The San Francisco Department of Emergency Management issued warnings of significant transit disruptions across the city, advising residents to avoid nonessential travel and treat nonfunctioning traffic signals as four-way stops. Public transportation, including Muni and BART services, experienced major interruptions with several stations closed and service delays due to the outages, according to AA and LA Times.

As evening approached, PG&E reported via social media that they had stabilized the power grid and were not expecting further outages; however, restoration timelines for the affected customers remain unclear. The utility has coordinated with city officials and first responders to address the situation, according to HuffPost and AA.