Video from above the scene shows the fire being fueled by hundreds of burning pallets.
The Los Angeles County Fire Department says it received reports of fire and smoke coming from the rear of the building.
COMMERCIAL STRUCTURE FIRE | FS 158 | 16325 S. Avalon Blvd. #Carson | Units on scene report smoke and fire showing from rear of building. Upgraded to a 2nd Alarm, #LACoFD aggressively attacking this fire with over 75 firefighters at this time.#LACoFD #AvalonIC— L.A. County Fire Department (@LACoFDPIO) September 30, 2021
It's unclear what prompted the fire. Residents in the area are urged to stay away from the area as crews battle the blaze.