A large, unplanned power outage knocked out electricity across San Francisco's Outer Sunset and Lakeshore neighborhoods yesterday, and officials say some traffic signals in the area have gone dark as a result. Drivers approaching any intersection with a dead signal are being told to treat it like a four-way stop while crews work to restore service.
The San Francisco Department of Emergency Management posted the alert just after 6:13 PM, warning that the outage was affecting PG&E customers in Outer Sunset and Lakeshore and directing residents to PG&E's outage map for the most current restoration information. The department did not specify a cause for the outage or an estimated restoration time in its post.
A large, unplanned power outage is impacting PG&E customers in Outer Sunset and Lakeshore. Traffic lights in this area may be impacted. If a traffic signal has gone dark, always treat it as a four-way stop. For the most current information, visit: https://t.co/DthlRd2zLd
— San Francisco Department of Emergency Management (@SF_emergency) August 13, 2026
Un… pic.twitter.com/XDrogdIYKn
Under California law, a dark traffic signal is not a suggestion — it's a legal four-way stop. California Vehicle Code Section 21800(d)(1) requires drivers approaching an intersection with an inoperative signal to come to a complete stop and proceed only when it's safe to do so, according to Cron Israels & Stark. Violators can face a base fine of $238 that climbs past $490 once court fees are added, plus a point on their DMV record.
A Pattern of West Side Power Trouble
Wednesday's outage is the latest in a string of disruptions that have hit San Francisco's western neighborhoods over the past several months. Just weeks earlier, on July 18, an unexpected PG&E outage cut power to nearly 9,400 westside customers across the Richmond, Presidio, Sea Cliff, Golden Gate Park, and Panhandle neighborhoods, with the utility saying a protective device unexpectedly activated during routine switching work between two substations, per a report from SF Gate.
That incident followed a far larger failure in December 2025, when a major electrical fire at PG&E's Mission Substation cut power to roughly 130,000 San Francisco customers for up to 72 hours, hitting the Sunset and Richmond districts especially hard, according to KQED. An independent investigation by engineering firm Exponent, released in May, later concluded that humidity and condensation inside the open-air Mission Substation caused that blackout rather than a single equipment failure, KTVU reported.
The findings prompted dozens of Sunset District merchants to organize plans for a lawsuit against PG&E, and merchant groups have separately reported significant financial losses from spoiled inventory and lost business tied to the winter blackouts, according to Mission Local. In response to the recurring disruptions, San Francisco supervisors have called for formal public oversight hearings into PG&E's emergency response times and infrastructure upgrades, with city officials expressing frustration over delayed technician arrivals during past emergencies.
Where the Outage Sits and What Comes Next
The affected area falls within San Francisco's Supervisorial District 4 and the SFPD Taraval Station jurisdiction, which covers commercial corridors along Taraval Street, Noriega Street, and Lakeshore Plaza alongside institutions like San Francisco State University, according to Mission Local. It's a dense mix of small businesses and residential blocks that has now weathered multiple unplanned outages within the same year.
Hoodline previously covered a similar dark spell that hit the Outer Richmond and Sea Cliff in March, another instance of neighborhood frustration boiling over after repeat power failures on the city's west side.
How To Stay Informed and Keep Food Safe
Residents can sign up for direct alerts through AlertSF, the city's opt-in text service, by texting their ZIP code to 888-777, according to the San Francisco Department of Emergency Management. The service runs alongside Wireless Emergency Alerts and social media accounts to keep residents informed during infrastructure failures.
For real-time restoration updates, PG&E operates a 24-hour hotline at 1-800-743-5002 and an online Outage Center map that shows affected boundaries and customer counts by address. Federal food safety guidelines from the USDA and CDC note that an unopened refrigerator keeps food safe for up to four hours during a blackout, while a full, closed freezer holds safe temperatures for about 48 hours, or 24 hours if half full. Perishable items left above 40 degrees Fahrenheit for more than two hours should be discarded.
