ALAMEDA COUNTY — Cal Fire says a grass fire burning west of Tracy near Interstate 580 has been stopped.
The Patterson Fire, which started near Patterson Pass and North Midway roads, was 139 acres by Wednesday night.
The California Highway Patrol reports the interstate is open but traffic is slow through the area, so drivers should use caution and watch out for firefighters.
Cal Fire reports the cause of the blaze is still under investigation.
This story is developing.