A major fire burns at a medical supply warehouse in Tracy, California, destroying a facility estimated at about 1 million square feet. The blaze starts on Thursday and continues into at least its third day, with firefighters working to contain the flames and manage the large-scale smoke. Smoke is visible from miles away, and officials warn that air quality may be unhealthy for residents, prompting caution for people in the affected area.

Multiple outlets report that the warehouse is part of Medline Industries. The city, which has more than 100,000 residents, is located roughly 55 miles east of San Francisco. Authorities indicate they expect firefighting efforts to continue for several more days as crews battle a fire concentrated on the warehouse roof and throughout the structure.

Reports do not provide details on casualties or the cause of the fire in the provided summaries. The emphasis across coverage is on the size of the blaze, the ongoing emergency response, and public health advisories related to smoke and air quality.