PRESS RELEASE: Tracy Warehouse Fire

Air Alert and Health Caution Statements

A warehouse fire ignited in Tracy, California, on June 11, 2026, producing smoke that transported over portions of the San Joaquin Valley. During the initial stages of the incident, smoke aloft moved over the San Joaquin Valley and nighttime weather conditions caused smoke to mix down toward the surface and also transport farther east from Tracy into northern counties in the San Joaquin Valley, resulting in elevated PM2.5 concentrations in areas near and downwind of the fire.

Monitored air quality data showed the most pronounced impacts in the northern portion of the Valley, closest to the fire source, with concentrations declining with distance. While smoke transport across the broader Valley was observed visually and on satellite imagery through the period of Thursday (6/11) through Saturday (6/13), surface-level PM2.5 concentrations at District monitoring sites farther south showed more limited impacts.

Smoke production from the fire decreased over the weekend, and by Sunday (6/14) monitored PM2.5 concentrations had largely returned toward normal levels, with any remaining smoke impacts concentrated in areas nearest the fire. Further smoke impacts will be limited to areas in close proximity to the incident location. High temperatures and stable atmospheric conditions during this period also contributed to elevated ozone in some areas, independent of the fire event.

If you can see ash, smell smoke, you may be affected by fine particulate matter pollution. To reduce exposure, stay indoors when possible, close windows and doors, and use indoor air filtration to help keep indoor air clean. Sensitive individuals, including children, older adults, and those with heart or lung conditions, should take extra precautions and follow additional recommendations from their medical professionals and local health authorities.

Information on how to protect yourself from smoke impacts is available here and here.

Here's how you can stay informed:

For assistance or if you have any questions, please feel free to contact us.

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