Atlas Fire

Hillside homes at Silverado Country Club are seen through the haze of the Atlas Fire on Monday. The fire, which began on Sunday night, is one of a number of fires that have already burned more than 50,000 acres in Napa and Sonoma counties.

J.L. Sousa, Register

Wildfires produce some of Napa County’s worst-ever air quality

While most Napa County residents may be safe from the direct danger of nearby wildfires, the resulting torrent of smoke presents a continuing hazard on its own.

Regional air quality regulators are asking much of the county’s population to stay indoors as much as possible, citing worsening pollution from the more than 50,000 acres burning across the North Bay. Local pollutant levels are as severe as ever measured in the region, in some cases approaching levels unsuitable for healthy people as well as the elderly and sick, the Bay Area Air Quality Management District announced Tuesday.

“Honestly, we are recording some of the worst air quality ever recorded in any part of the Bay Area,” said district spokesman Tom Flannigan.

Heavy smoke from multiple wildfires, combined with regional winds, has led the air quality district to declare a smoke advisory for the entire Bay Area since Monday.