The vegetation fire is burning near North Flynn Road and Interstate 580.
CAL FIRE has been working in conjunction with Alameda County Fire to stop the blaze which broke out on steep terrain and amid windy conditions.
SKY7 was over the fire where a burned-out car could be seen on the shoulder of the freeway. It is believed that a car crash may have sparked the blaze.
People are asked to avoid the area.
Stay with ABC7 News for the latest details on this developing story.