BOISE -- Idaho wildfires kept crews busy as temperatures across the state soared to near 100 degrees.

A lightning-caused fire has burned nearly six square miles of grass, brush and timber in the Salmon-Challis National Forest about 40 miles west of Salmon.

U.S. Forest Service spokesman Mike McMillan says the fire, which was reported Sunday, is burning in rugged terrain that prevents the blaze from being fought on the ground. A sky crane helicopter that can drop 2,000 gallons is working on the Papoose Fire.

The Times-News reports boaters on the Middle Fork of the Salmon River may be asked to share campsites with other rafters and possibly firefighters.

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