Smoke from a wildfire near the northern boundaries of the San Joaquin Valley air basin is impacting San Joaquin County, with potential impacts in Stanislaus and Merced counties.
Air officials said the pattern may continue through the weekend, and encourage residents in these areas to monitor their local air quality and take appropriate precautions as needed.
“Our standard is, if you can smell smoke, you are being affected by it,” said Jaime Holt, the District’s chief communications officer.
Smoke produces large quantities of particulate matter, which can exacerbate or cause respiratory disease and lung damage.
The fire in Plumas County is producing smoke that is remaining in the air basin because of a stagnant high-pressure system.