Investigators examining the devastating fire that destroyed a massive Medline medical supply warehouse in Tracy, California, have identified the area where they believe the blaze originated.
Tracy fire officials said the fire most likely started at the eastern end of the warehouse, based on cellphone footage recorded during the early moments of the incident. The discovery has provided investigators with an important starting point as they continue examining what caused the destructive fire.
The blaze erupted on June 11, 2026, at the Medline distribution facility on Promontory Parkway. The approximately one-million-square-foot building was quickly overwhelmed by flames, producing enormous clouds of smoke visible across the surrounding community.
Firefighters from multiple agencies responded, but suppression efforts were complicated by problems involving the facility’s private fire protection water system. Officials said the sprinkler system was not operating properly and water pressure at the facility’s hydrants was inadequate.
Strong winds, high temperatures and dry conditions also contributed to the rapid spread of the fire.
Tracy Deputy Fire Chief Brian Bagley explained that investigators were relying on early cellphone footage to identify the likely point of origin. The eastern section was being preserved for further examination once conditions allowed investigators safe access.
The fire destroyed the warehouse and scattered debris into nearby neighborhoods. Authorities also raised concerns about smoke exposure and potential environmental impacts.
Fortunately, Medline confirmed that all employees and other personnel at the facility had been safely evacuated and accounted for. No employee fatalities were reported.
Although investigators have identified the likely origin area, the precise cause of the fire has not been officially determined. The fire marshal and the Bureau of Alcohol, Tobacco, Firearms and Explosives were involved in the investigation.
The findings are expected to help authorities establish how the blaze started and whether failures in the building’s fire protection systems contributed to the scale of the destruction.