Vegetation fire burns in Concord near Highway 4

A wind-whipped vegetation fire was burning in Concord near Highway 4 Wednesday afternoon, authorities said.

Cal Fire said the Willow Fire began burning in the area of Willow Pass Road and Avila Road at about 1:19 p.m. As of about 2:30 p.m. the fire had reached 70 acres and was 30% containment, but forward progress was stopped, Cal Fire said.

Winds in the area were gusting to 24 mph, according to the National Weather Service.

No structures were immediately threatened. Cal Fire said it was battling the fire in unified command with the Contra Costa County Fire Protection District.

The cause of the fire was still under investigation, according to Cal Fire.

This is a breaking news update. More information to be added as available.