Fire crews knocked down a stubborn blaze yesterday in an abandoned two-story commercial building in Daly City that authorities say was set by trespassers. The fire, at 101 Wellington Ave., was confined to the first level, and search-and-rescue crews swept the structure but found no one inside, according to officials.
SFGATE reports that Bay City News Service said firefighters were called just before 1 PM for a commercial-structure fire at the Wellington Avenue address. Crews arrived to find smoke and flames coming from the first floor and worked to put out the blaze. Investigators told the news service they believe trespassers started the fire.
Fire crews' response and the scene
The North County Fire Authority, which serves Daly City, Brisbane and Pacifica, has been dealing with more than its share of problems at vacant buildings in the area. In September 2025, the agency reported a similar human-caused fire at 101 Wellington Ave., when trespassers reportedly used open flame for cooking in the basement, according to a post from the fire agency. That earlier response was documented by the North County Fire Authority.
Vacant properties pose recurring risks
Fire agencies and safety experts say empty structures often draw people seeking shelter, and the use of open flames for cooking or warmth can quickly escalate into a full-blown incident. The U.S. Fire Administration has urged cities to tackle the problem through coordinated outreach and prevention efforts, including targeted inspections and community programs, to reduce fires linked to encampments and vacant buildings. The U.S. Fire Administration has outlined those strategies in its guidance.
What officials and neighbors can do
Investigators are still looking into the cause of the Daly City blaze, and there were no reports of injuries or arrests, according to city and fire officials. Residents who notice suspicious activity in or around vacant properties are urged to contact local authorities. The North County Fire Authority lists the main contact line on its website. For active fires, officials stress that people should call 911; for non-emergencies, they can use the agency's regular contact page.
