San Bruno pipeline explosion: San Francisco briefs mutual-aid response as NTSB begins probe

San Francisco—s Disaster Council met Sept. 10 to review the city—s response after an explosion and fire in San Bruno the previous evening, with the mayor, fire chief, hospitals and PG&E outlining emergency actions, casualty transfers and the initial steps of a federal investigation.

Mayor Gavin Newsom opened the briefing and thanked emergency personnel and partner agencies for their rapid work, noting that "13 people were transported into the city and county of San Francisco. 3 of them have been released," and that city hospitals and trauma teams were providing critical care.

Chief Joanne Hayes White, describing the department—s deployment, said the first report came at about 06:24 and that airport-based apparatus were on-scene within minutes: "Within 6 minutes we had units deployed up in San Bruno from the airport." She said approximately 15 apparatus and 48 personnel responded during the initial phase and that most apparatus had been released as recovery shifted, leaving a fuel unit and a state asset rig supporting ongoing work.

PG&E—s representative, Mark Johnson, told the council that preliminary information points to "a rupture of a 30 inch steel gas main transmission line" as the apparent cause. He said PG&E had interrupted service to roughly 5,800 customers for safety and that a team from the National Transportation Safety Board arrived to lead the investigation. "They will have lead responsibility for the investigation, and root cause analysis," Johnson said, adding the company will "fully cooperate" and accepts it may be held accountable if the probe finds liability.

Dr. Mitch Katz, describing the medical mutual-aid response, said San Francisco hospitals received several patients: "We took 5 patients last night, 4 of whom are critical," and that burn and trauma care flowed to St. Francis, UCSF and other regional centers. He said the city also offered mental-health and translation services to support victims and responders.

City leaders emphasized public-safety guidance for residents. Mayor Newsom and fire officials repeatedly advised that anyone who smells gas should call 911 so the city can triage and dispatch appropriate responders. Fire deputy chief Pat Gardner reinforced the point: "You should call 911 anytime you smell gas in your building."

Officials described mutual-aid coordination across counties and agencies. The city offered transportation and logistics support to San Bruno, activated offers from multiple departments and nonprofit partners, and pointed residents and city employees seeking to donate or volunteer to coordinated channels. The city manager said the city—s "SF Gives Back" page on sfgov.org is available for organized contributions in addition to Red Cross donation channels.

Mayor Newsom said city leaders will immediately review local utility infrastructure and replicate prior electrical-system task forces for gas transmission and distribution: Chief Hayes White and the city administration will lead a work group to identify vulnerabilities and work with PG&E and federal investigators. The NTSB-led probe is expected to span several months.

Next steps: the council asked departments to continue situation reporting, maintain offers of mutual-aid staff and resources, and to coordinate with the NTSB and PG&E as the investigation proceeds. The Disaster Council postponed other agenda items to focus on the recovery and investigation effort.