The Fairfield Fire Department says a 7-alarm has spread to homes near I-80 and Marigold Drive.
At least five structures began to burn shortly after 4 p.m.
The fire also led to the closure of two lanes along I-80 because of fire and smoke on the shoulder, according to the CHP. A fire truck reportedly became stuck in heavy traffic.
Nearby residences were asked to evacuate, and vehicles in a nearby AT&T parking lot were also reportedly burned, Highway Patrol said.
Crews have also reportedly ordered a strike team from Cal Fire to assist in battling the flames.
High winds helped the flames spread.
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