YOLO COUNTY (CBS SF) – The Cold Fire burning in Yolo County east of Lake Berryessa grew to at least 4,700 acres Thursday and was 15 percent contained Thursday morning, according to Cal Fire officials.

The vegetation and oak woodland fire near state Highway 128 was reported around 4:30 p.m. Tuesday.

PG&E high voltage lines along Highway 128 remain threatened, Cal Fire officials said Wednesday.

Highway 128 is closed from the Monticello Dam at Lake Berryessa in Napa County on the west to Pleasants Valley Road on the east.

There were 700 firefighters on the fire as of Wednesday, according to Cal Fire.

Mandatory evacuations are in effect at the Canyon Creek campground and the Golden Bear Estates in Winters. An evacuation center has opened at 700 Main St. in Winters in Yolo County.

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