SAN FRANCISCO — Saturday, Dec. 20, 2025 — A massive, fast-moving PG&E power outage swept across San Francisco, leaving roughly one-third of the city without electricity at its peak and triggering cascading disruptions: darkened streetlights and traffic signals, halted or rerouted transit service, and shuttered or cash-only businesses on one of the busiest weekends of the holiday shopping season. San Francisco Standard+1 By mid-afternoon, PG&E outage data cited by local outlets showed about 125,016 customers (30.2%) without power, concentrated largely across central and western neighborhoods—including the Sunset and Richmond districts—while officials also confirmed an active fire at a PG&E substation