The Pickett Fire burning in the Napa Valley during peak season for wine country tourism is prompting air quality alerts in surrounding communities as crews continue to fight the fire in rugged terrain.

Air quality reached “very unhealthy” levels in parts of the region Friday afternoon as smoke spread from the growing Pickett Fire.

The Bay Area Air District has extended an air quality advisory until Monday due to wildfire smoke from the Pickett Fire. The Pickett Fire smoke, according to officials, is expected to impact Napa, Solano and Sonoma counties.