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LAKE CO, CA - Two major grass fires are burning in LakeCounty this weekend, according to state fire officials.

The Walker fire, at Walker Ridge and state Highway 20 near the Colusa County border, has consumed around 400 acres, some of them in Colusa County, Battalion Chief Julie Hutchinson said.

The fire, reported at 3;49 p.m., is in a fairly remote rural area dominated by oak woodland, Hutchinson said. The second fire, however, is much larger and is threatening inhabited areas.

The Wye fire, reported just after 4 p.m., is burning on around 5,000 acres in the area of state Highways 20 and 53. The fire is threatening Spring Valley, an unincorporated community with a reported population of more than 800 people, and reidents in the area have been ordered to evacuate, Hutchinson said. One structure has been lost, but Hutchinson could not confirm whether it was a home.

Both fires remain uncontained, and the causes remain under investigation. Around 100 fire personnel are on the scene of the Walker fire, and another 200 to 300 at the Wye fire.

Hutchinson said there have not been reports of strong winds, but high temperatures have left the vegetation in the area very dry.

"We've had a week or more of really high temperatures accompanied by a winter with very little rainfall, so the vegetation has all been very dry, very drought stressed," Hutchinson said.