DOYLE (CBS SF) — The Beckwourth Complex Fires burning near the Nevada border grew to three times the size of San Francisco, by Monday night.

Late Saturday, the Sugar Fire, one of the blazes grouped into the Beckwourth Complex Fire, roared through the Lassen County community of Doyle consuming homes, businesses and vehicles.

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Firefighters spent the weekend, going block by block, home by home to battle the advancing the wall of flames. As many a two dozen homes were destroyed or damaged. Fortunately, the vast majority of residents obeyed the mandatory evacuation orders. There were no reports of injuries or deaths.

The Beckwourth Complex Fire — a combination of two lightning-caused fires — the Dotta Fire, which started on June 30, and the Sugar Fire, which started on July 2 — was burning 45 miles north of Lake Tahoe. As of Monday night, the complex fire charred 91,200 acres and was 26% contained.

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Hundred degree temperatures have made for sweltering conditions for firefighters.

Late Saturday, flames jumped Interstate 395 and were threatening properties in Nevada’s Washoe County.

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“Take immediate steps to protect large animals and livestock,” the The Truckee Meadows Fire Protection District tweeted.