Investigators believe the fire started by a car accident, but the cause is still under investigation.
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Flames broke out around 2:30 p.m. at the south end of Lake Berryessa in the Cold Canyon area near Highway 128. Three hikers in the area were safely rescued.
Steep terrain and winds in the area are making the firefight difficult. Cal Fire says they have several air tankers doing water and fire retardant drops. They also have several hundred firefighters battling this fire from the ground.
Wind guests in the early evening reached up to 31 mph and steady winds have been coming from the southwest at 21 mph. Around 6 p.m. it was 73 degrees in the area with 38 percent humidity.
PHOTOS: Large fire burns south of Lake Berryessa
A large plume of smoke has stretched toward Winters and Davis. The smoke was also visible from Vacaville.
Current Evacuations: Quail Ridge and Golden Bear Communities are under mandatory evacuations. Canyon Creek and Lake Solano Campgrounds, and Cold Canyon Area have already been evacuated.
The Red Cross has opened an evacuation center at the Winters Community Center, located at 201 Railroad Ave, Winters, CA.
A large animal evacuation center has opened at 29775 County Road 31, Winters, CA.
VIDEO: Escape from Wragg Fire captured on video
The sky west of Davis is smoke from a 700+ acre fire near lake Berryessa. No threat to the campus/the City. We are getting many inquiries...— Nathan Trauernicht (@FireChiefT) July 23, 2015
Stay with abc7news.com for updates on this developing story.