STANISLAUS COUNTY, Calif. — Update 12:50 p.m. :

The Rock Fire is 2,242 acres and 50% contained, according to Cal Fire. No structures are threatened. Del Puerto Canyon Road remains closed.

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Firefighters are working to contain a fire in Stanislaus County, according to Cal Fire.

The Rock Fire is burning on Del Puerto Canyon Road, west of Patterson. The road is closed while firefighters try to extinguish the fire.

The fire began Tuesday night. As of Wednesday afternoon, it has burned 1,000 acres and is 15 percent contained, according to Cal Fire's Santa Clara Unit.  

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