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.

Sonoma, Napa and Solano counties will likely be impacted by smoke from the Pickett Fire, the Air District said Thursday.