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Wildfire that closed key California highway doubles in size

A roaring wildfire that has shut down a stretch of a major interstate in a rural area near the California-Oregon border has nearly doubled in size overnight.

The blaze in California's Shasta-Trinity National Forest was burning out of control Saturday with crews scrambling to prevent it from reaching mountain communities.

The fire has chewed through 58 square miles (150 square kilometers) of timber since Wednesday.

Flames from a backfire burn around a fire truck battling the Delta Fire in the Shasta-Trinity National Forest, Calif., on Thursday, Sept. 6, 2018. (AP PhotoNoah Berger)

Authorities said Friday that a 45-mile (72-kilometer) section of Interstate 5 would remain closed at least until Sunday.

The highway runs from the U.S.-Mexico border to Canada.

The fire destroyed thousands of trees that could fall onto the highway.

Firefighters monitor a backfire while battling the Delta Fire in the Shasta-Trinity National Forest, Calif., on Thursday, Sept. 6, 2018. California is taking a financial wallop from unrelenting wildfires that have drained its firefighting budget and prompted nearly $1 billion in property claims even before the start of the dangerous fall fire season, officials said Thursday. (AP PhotoNoah Berger)

Crews near California's border with Nevada gained minimal containment of another wildfire that closed highways on the edge of the Sierra Nevada.

A scorched VW Beetle rests in a clearing after the Delta Fire burned through the Lamoine community in the Shasta-Trinity National Forest, Calif., on Thursday, Sept. 6, 2018. (AP PhotoNoah Berger)

Embers fly above a firefighter as he hustles to control a backfire as the Delta Fire burns in the Shasta-Trinity National Forest, Calif., on Thursday, Sept. 6, 2018. (AP PhotoNoah Berger)

A firefighter passes flames from a backfire while battling the Delta Fire in the Shasta-Trinity National Forest, Calif., Thursday, Sept. 6, 2018. (AP PhotoNoah Berger)

A firefighter battles the Delta Fire in the Shasta-Trinity National Forest, Calif., on Thursday, Sept. 6, 2018. California is taking a financial wallop from unrelenting wildfires that have drained its firefighting budget and prompted nearly $1 billion in property claims even before the start of the dangerous fall fire season, officials said Thursday. (AP PhotoNoah Berger)

Firefighters light backfire while battling the Delta Fire in the Shasta-Trinity National Forest, Calif., on Thursday, Sept. 6, 2018. California is taking a financial wallop from unrelenting wildfires that have drained its firefighting budget and prompted nearly $1 billion in property claims even before the start of the dangerous fall fire season, officials said Thursday. (AP PhotoNoah Berger)

Firefighters monitor a backfire while battling the Delta Fire in the Shasta-Trinity National Forest, Calif., on Thursday, Sept. 6, 2018. (AP PhotoNoah Berger)

Embers fly above a firefighter as he works to control a backfire as the Delta Fire burns in the Shasta-Trinity National Forest, Calif., on Thursday, Sept. 6, 2018. The blaze had tripled in size overnight. (AP PhotoNoah Berger)

Flames from a backfire burn a hillside as fire fighters battle the Delta Fire in the Shasta-Trinity National Forest, Calif., on Thursday, Sept. 6, 2018. (AP PhotoNoah Berger)