LAKE BERRYESSA (CBS SF) — A fast-moving wildfire in Napa and Solano counties has grown by 2,000 acres overnight and now has scorched over 9 square miles of countryside near Lake Berryessa.

The blaze, which authorities call the “Wragg Fire,” has maintained a rapid rate of spread helped by erratic wind conditions, Cal Fire spokeswoman Suzie Blankenship said.

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The fire was 5 percent contained as of 6:15 a.m.

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Some 200 structures are threatened Thursday morning and the communities of Quail Ridge and Golden Bear are under evacuation orders. Two campgrounds have also been evacuated.

One out-building was destroyed and one home was damaged.

The fire erupted Wednesday and was initially reported as being caused by a vehicle accident, but authorities now say the cause remains under investigation.

More than 520 firefighters are battling the flames in rugged, steep, brush-covered terrain.

Some people tried to use hoses to fight the flames on their own. Aerial footage shows wild deer, horses and cows making a run from the blaze.

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Smoke from the fire spread to the Sacramento area.

Meanwhile, ash from the fire made its way to the town of Winters in Yolo County.

The air filled with so much smoke Wednesday night that some people needed masks.

Ash from the fire rained down covering streets and cars.

Highway 128 is closed at Wragg Canyon.

No injuries have been reported and at this time.

The Red Cross has opened an evacuation center at the Winters Community Center at 201 Railroad Ave., in Winters, according to Blankenship.

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