Forward progress stopped on brush fire near Tracy, CAL FIRE says; I-580 partially reopens

LIVERMORE, Calif. -- Forward progress has stopped on a grass fire that burned in a rural area of Alameda County between Livermore and Tracy on Thursday.

The CHP wrote on X they're opening the left lane of I-580 in both directions at I-205.

Four structures are threatened and traffic on Interstate Highway 580 is still heavy Thursday evening.

Soon after it started, the Midway Fire jumped I-580 and is threatening four commercial structures, said Cal Fire spokesperson Chelsea Burkett.

After jumping the freeway, the fire was held at the California aqueduct, a concrete-lined canal.

The fire was first reported near the intersection of Patterson Pass and Midway roads.

Dry conditions, combined with gusty winds, are driving the fire. "The fuel there is pretty dry and receptive to fire right now," Burkett said.

In addition to ground crews and eight fire engines, Cal Fire reported that six fixed-wing aircraft and one helicopter were responding to the fire. An estimated 150 personnel are fighting the fire.

No injuries have been reported.

Winds in the area are reportedly blowing from the west, pushing the fire towards Tracy, and clocking in at between about 30 mph to about 40 mph.

The Midway Fire was first reported to be about 2 acres at a little before 3 p.m. and then reported as about 30 acres with a moderate to dangerous rate of spread at about 3:20 p.m., according to the Firefighters Association.

Stay with ABC7 News for the latest details on this developing story.