Officials said the fire, described as one of the largest warehouse fires in U.S. history, has been extinguished. The San Joaquin Office of Emergency Services reported good air quality Wednesday, and the Tracy Fire Department transferred control of the site back to Medline earlier in the day.
Residents have been visiting the site to see the aftermath of the fire.
"I wanted to come by here. I didn't realize it was this bad. It's awful," said Tracy resident Ramona Philips.
Philips said smoke from the fire had a noticeable impact in the days immediately following the blaze.
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"You know, I haven't noticed any difference in the air quality. But the first two days, the smoke was really bad. It was dark, dark, dark," she said.
On Wednesday, some employees were allowed to return to retrieve vehicles that were not damaged in the fire.
Fire officials said debris from the blaze has spread across a wide area of the city.
"The debris field that is scattered -- the six square miles, including the Tracy Hills development," said Deputy Chief Brian Bagley of the Tracy Fire Department.
Officials have been advising residents on how to safely handle debris that may have landed on their properties. Hazmat teams are available to assist and safety supplies, such as masks and gloves, are being distributed at Fire Station 95.
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"We have already had over 350 homes reach out to us in regards to having their homes cleaned," Bagley said.
The San Joaquin Office of Emergency Services also released a list of chemicals stored at the facility, warning that ash and debris may contain hazardous materials, including metals and other fine particles that could be harmful if inhaled or touched without proper precautions.
Philips said she believes her immediate neighborhood is safe but acknowledged the broader impact of the fire.
"I know people -- stuff came flying down in their yards. And they were told not to use it, to touch it," she said.
Fire crews remain on site, monitoring for hot spots, as demolition work continues. Officials said testing of air and water quality is ongoing, with more data expected in the coming days.