The fire ignited just before 11 a.m. near Deer Valley Road and Albers Court and quickly spread, forcing the fire district to call for a three-alarm response. More than 60 firefighters were fighting the blaze.
CAL FIRE says the fire is 22.8 acres and 95% contained. Forward progression has stopped.
Officials say no evacuations have been ordered.
Bay City News contributed to this report.
Stay with ABC7 News for the latest details on this developing story.