By MES Dispatch Staff
The Briefing
- An 18-month investigation concluded August 5 that electrical arcing from an out-of-service Southern California Edison transmission tower ignited the Eaton Fire that killed 19 people and destroyed over 9,400 buildings in Altadena in January 2025.
- The California Department of Forestry and Fire Protection and Los Angeles County Fire Department determined that two rapid electrical arcing events dislodged burning material that fell into dry brush, igniting a conflagration within 12 seconds under extreme Santa Ana wind conditions.
- The report identified eight violations of state criminal and public utility codes tied to Southern California Edison; details remain redacted pending review by the Los Angeles County District Attorney’s Office.
- Southern California Edison has maintained that one of its transmission lines likely caused the fire but has denied full financial responsibility and is facing multiple lawsuits from fire victims and property owners.
- The Eaton Fire burned approximately 14,000 acres over 24 days and became one of Los Angeles County’s most destructive natural disasters.
LOS ANGELES, CALIF. — State fire investigators concluded August 5 that a Southern California Edison transmission tower sparked the deadly Eaton Fire that devastated Altadena in January 2025, according to a report released jointly by the California Department of Forestry and Fire Protection and Los Angeles County Fire Department.
The investigation, conducted over 18 months by the Los Angeles County Fire Department’s arson investigation unit in conjunction with Cal Fire, determined that electrical arcing events on the out-of-service transmission tower ignited the fire on the night of January 7, 2025. The report concluded that two electrical arcing events occurring in rapid succession dislodged burning material, which fell from the tower into the dry brush fuel bed below.
Video evidence reviewed during the investigation documented the two electrical arcing events from the Southern California Edison transmission tower location in Eaton Canyon. Within 12 seconds of the burning material igniting the brush, the fire developed into a conflagration that ultimately burned approximately 14,000 acres over 24 days, destroyed more than 9,400 buildings, and killed 19 people across the Altadena community.
Los Angeles County Fire Department officials stated that the investigation concluded electrical arcing was the cause of the wildfire after thorough review of evidence alongside retained electrical and metallurgical experts. The report identified eight violations of state criminal and public utility codes appearing to be tied to Southern California Edison; however, details of those violations remain redacted pending ongoing review by the Los Angeles County District Attorney’s Office.
Southern California Edison officials acknowledged receiving the report and stated they are reviewing its findings. An Edison representative stated the company has taken its potential role in the fire’s origin seriously and continues supporting the Altadena community through its Wildfire Recovery Compensation Program. The utility has previously maintained that one of its century-old transmission lines likely caused the fire but has denied full financial responsibility, facing multiple lawsuits from fire victims. Edison is also engaged in counter-litigation against Los Angeles County and water providers, contending they share responsibility for the fire’s toll, including citing delayed evacuation alerts that in some parts of west Altadena came after the fire had already threatened residential areas.
The Eaton Fire ignited during an extreme Santa Ana wind event that also produced the deadly Palisades Fire on the same day. Together, the two fires became the most destructive natural disaster in Los Angeles County history.