A massive fire is seen erupting at the Chevron refinery in El Segundo, California, on Thursday, Oct. 3, 2025. (KABC)(LOS ANGELES) — Firefighters were battling a blaze at a Chevron refinery in Southern California late on Thursday, company and government officials said, after a massive fireball erupted at the facility. It was not immediately clear what caused the blaze, which was burning in El Segundo, a city in Los Angeles County. “All refinery personnel and contractors have been accounted for and there are no injuries,” Allison Cook, a Chevron spokesperson, told ABC News. Chevron’s firefighters were joined by emergency personnel from El Segundo and Manhattan Beach in responding to the “isolated” fire within the facility, the Chevron spokesperson said.