Watch: a timelapse of California's biggest wildfire this year

At least two people have died from a raging California blaze that was among several menacing thousands of homes Monday in the Western U.S.

Two bodies were found inside a charred vehicle Sunday in the driveway of a home near the remote community of Klamath River, the Siskiyou County Sheriff’s Office said in a statement.

The McKinney Fire in Northern California near the state line with Oregon exploded in size to nearly 87 square miles (225 square kilometers) after erupting Friday in the Klamath National Forest, firefighting officials said.

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It is California’s largest wildfire of the year so far and officials have not yet determined the cause.

On Monday, heavy rain helped dampen the fire but it still threatened structures after torching more than 100, ranging from homes to greenhouses, fire and sheriff's officials said.

About 2,500 people remained under evacuation orders.