More than 4,000 acres have burned this month in four fires in rugged, forested parts of north Anderson County, state officials said Thursday. Smoke hangs high in the air above the mountains north of Oliver Springs on Thursday evening, Nov. 10, 2016. (Photo by John Huotari/Oak Ridge Today)

Note: This story was updated at 3:20 p.m. Nov. 12.

NEW RIVER—More than 4,000 acres have burned this month in five fires in mountainous north Anderson County, state officials said.

In Anderson County, 4,235 acres had been burned by the five fires as of Saturday afternoon, according to an update posted by the Tennessee Department of Agriculture Division of Forestry. That was the most acres burned by fires that were still active in Tennessee on Saturday.

Arson is listed as the cause of four of the Anderson County fires, according to the update. Debris is the cause of another.

Smoke from at least two fires hung high above the mountains north of Oak Ridge and Oliver Springs on Thursday evening. It reduced visibility to a few hundred feet on the northernmost section of Highway 116 in rural Anderson County on Friday morning. Smoke was thick near a bridge at a 90-degree bend in the highway at the Campbell County line in northern Anderson County, irritating throats and making it harder to breathe. Firefighters said there was a nearby fire that they called Bootjack, up Stoney Fork Road, which goes north into Campbell County. [Read more…]