Hazy skies are expected to linger over the North Bay for the next two days due to wildfire smoke from the Pickett Fire burning in Napa County, air district officials said Monday.

An air quality advisory has been extended through Wednesday as smoke from the fire continues to impact Napa, Solano and Sonoma counties, according to the Bay Area Air District.

The Pickett Fire burning north of Calistoga has charred 6,803 acres since it broke out Thursday afternoon near the 2300 block of Pickett Road in Napa County. Containment as of Monday morning was 13 percent, according to Cal Fire. The cause is under investigation.

Exposure to wildfire smoke is unhealthy even for short periods of time, the air district said. Residents should stay indoors with windows and doors closed until smoke levels sub

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