Three of the fires are burning right now at Knights Valley in Sonoma County, near Highway 128 and Yellow Jacket Ranch Road. The fires were started by a downed powerline. Those fires are estimated to be 200 acres. Winds gusts of up to 56 mph overnight helped fan the flames.
The fourth fire is in Yountville, near Silverado Trail and Oakville Crossroad. About 75-100 firefighters have been battling the 50 acre blaze and it is about 40 percent contained. The wildfire burned a barn, but no other structures are being threatened.