Fire crews contained a roughly 75-acre grass fire in the center divide of Interstate Highway 580 in Alameda County Sunday afternoon.
Cal Fire and California Highway Patrol officers responded to a report of the grassfire in the center divide of the highway at 2:19 p.m. in the vicinity of the North Flynn Road off-ramp.
Firefighters are still trying to determine what sparked the blaze, Cal Fire Battalion Chief Paul Provence said. High winds made controlling the fire more difficult.
Fire crews were able to contain the grass fire at 4:30 p.m.
"We do have more of a grass crop than we have had in prior years," Provence said. "We definitely expect it to be an active fire season."