Officials said Tuesday that the Eaton fire was ignited by electrical sparks from an inactive Southern California Edison transmission tower, ending an 18-month review of the blaze that killed 19 people and destroyed more than 9,400 buildings in Altadena.
The finding lands on a day when residents are still searching for answers about what set the fire in motion on Jan. 7, 2025. Fire officials said video footage showed an unknown burning material falling from the tower to dry vegetation in the Eaton Canyon area, and that the fire ignited about 12 seconds later.
That sequence gave investigators a way to connect the tower to the start of the blaze without relying on a single witness or a single scene. By combining the video, the burn pattern, the condition of the tower and expert review over 18 months, officials concluded the fire began at equipment that was out of service when it sparked the dry brush below.
Anthony C. Marrone said the cause may now be known, but the damage remains with the people of Altadena. He said the focus is still on helping residents rebuild their homes and livelihoods, and on making sure the lessons from the fire lead to meaningful change in memory of the 19 people who died.
The finding also brings the county’s fire department into direct conflict with Southern California Edison’s own view of the disaster. Kathleen Dunleavy said the company had taken its potential role in the start of the fire seriously from the beginning, but also said wildfire events of the Eaton fire’s size are rarely the result of a single factor. That leaves room for a broader dispute over how much blame a single tower can bear in a disaster of this scale.
Southern California Edison had already set up a compensation fund for victims in October, before investigators had officially determined the cause. The move signaled that the utility expected legal and financial fallout even before the report was released, and that expectation now hardens into a formal finding tied to a fire that burned through Altadena during the same week another blaze killed 12 people in the Pacific Palisades.
The Eaton fire and the Pacific Palisades blaze became the second deadliest wildfire disaster in California state history, behind the Camp fire in 2018, which killed 85 people in Paradise, Calif. The two fires are estimated to have caused up to $164 billion in total property and other losses, a figure that shows why the cause determination matters far beyond one neighborhood.
The next chapter is already set in motion. Jonathan Rinderknecht will be retried in October after a Los Angeles judge declared a mistrial last month in the case against him, and the utility’s compensation fund will now face the pressure of a fire department report that says sparks from an inactive tower started one of California’s most destructive fires.
