UPDATE: Local crews head out to fight fast-moving wildfire in Napa County

UPDATE 7/23/15 9:44 a.m.: One strike team and one local government team have left the Central Coast to help fight the Wragg Fire, according to fire officials.

PREVIOUS STORY: Firefighters continue to battle a now 6,900 acre wildfire in Napa and Solano Counties that is suspected to be started by a vehicle accident.

According to Cal Fire, more than1,506 firefighters are at the scene of the Wragg Fire. Cal Fire brought in six air tankers,157truck companies, 35 bulldozers and 18 water tenders to try to slow down the fire.

It sparked shortly before 2:30 p.m. Wednesday.

The wind-whipped fire is burning near Lake Berryessa and is moving from Napa County to Yolo County.

Firefighters are having difficulty gaining access to the fire because it is burning through brush-covered rugged terrain.

There are 150 structures being threatened. One structure has been damaged.

The Red Cross has opened an Evacuation Center for people who are displaced.

Highway 128 remains closed in the fire area.

The fire is 20 percent contained.