Smoke and ash from the County Fire affected air quality in the Bay Area on Sunday, resulting in the the Bay Area Air Quality Management District to issue a smoke advisory, which warned the negative impacts on air quality could continue into Monday and linger until Wednesday. "We remain in constant, direct contact with all agencies involved".
Curry said officials couldn't get a size update Monday afternoon due to the fire activity and smoke.
"A lot of friends and family were texting today and saying they were having some PTSD", said Savannah Kirtlink, who evacuated her Napa home during the blazes in December.
In comparison, a deadly wildfire that destroyed whole neighbourhoods in Sonoma County a year ago burned 57 square miles (147 square kilometres).
"What's unusual about this fire is really just the intensity of the fire at this particular point in the summer", Anthony said.
More firefighters were arriving to battle the blaze that has prompted the evacuation of more than 2,000 homes.
Dry conditions in the West and Southwest have made the areas prone to blazes and have exacerbated around 40 major fires between Washington State and New Mexico so far this year, the National Interagency Fire Center said.
Our VERY UNOFFICIAL estimate based on satellite data indicates that at 3 a.m. Monday it had burned approximately 42,000 acres - roughly 1,100 acres an hour since it was reported at 2:12 p.m. June 30.
Road closures have been issued for Northbound County Road 87 from Highway 128, Berryessa Knoxville Road, from the Pope Creek Bridge to the Napa/Lake County line, eastbound Highway 128 at Markley Resort, westbound Highway 128 at Pleasant Valley Road, and Pleasant Valley Road.
Minutes later, the fire would spread to flat land, forming a ring of fire.
Rocky Mountain National Park spokeswoman Kyle Patterson said in an email that none of the multiple fires burning in the Grand County area are inside the park boundaries, but the park's Coyote Valley Trail is now closed.