LIVERMORE, Calif. (KGO) -- The Grant Fire near Altamont has grown to 500 acres, jumping Interstate 580 and closing both directions of the highway for a period of time, according to Alameda County fire officials.
The Westbound section of the interstate reopened around 9:30 p.m. Sunday evening. The Eastbound side remains closed.
The blaze is 25 percent contained, according to officials, and firefighters are making further progress.
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The highway is closed from North Flynn Road near Livermore to Grant Line Road near Tracy, according to the California Highway Patrol.
Fire officials said at 6:40 p.m. that there is no visibility in the area due to thick, black smoke. No injuries have been reported.
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A Sig-alert was issued at 6:29 p.m. and there is currently no estimated time of opening, according to the CHP.