Pickett Fire, which began on Aug. 21, has spread to more than 6,800 acres through Napa County, just east of Santa Rosa, as of Aug. 25. The fire is 13% contained, and its cause remains under investigation, according to the California Department of Forestry and Fire Protection (Cal Fire).

More than 2,000 fire personnel are on scene Monday as the Pickett Fire continued to burn in California's Napa County for a sixth day.According to Cal Fire, the fire has burned 6,803 acres and was 17% contained as of 6:3:8 a.

As of Sunday evening, the fire near Calistoga had scorched more than 6,800 acres and was 11% contained, fire officials said.