The Pickett Fire, which has been burning since Thursday afternoon near Calistoga, prompted new evacuation orders on Saturday morning as the blaze continued to move east and challenge control lines, according to fire officials.

The Pickett Fire in California's Napa County has burned 6,803 acres as of Sunday morning, making it the largest fire in the Bay Area since last year.

The declaration allows the county to utilize state and federal resources for emergency response, recovery, damage mitigation and reimbursement for extra costs due to the wildfire.