The Pickett Fire in California's Napa County had burned 4,690 acres as of Saturday morning, making it the largest fire in the Bay Area since last year.

The Pickett Fire, burning since Thursday afternoon near Calistoga, spurred new evacuation orders Saturday morning as the blaze continues to move east and challenge control lines, according to fire officials.

The blaze has prompted evacuation orders for dozens of rural residents and threatens several wineries and vineyards in the area.