IDAHO CITY, Idaho (AP) — A southwest Idaho wildfire burning timber in rugged terrain and pushed by winds grew to 60 square miles on Monday as drones again interfered and a firefighter had to be treated at a Boise hospital for burns.

Officials say temperatures in the 90s combined with wind and low humidity caused the fire to expand 17 square miles on Sunday. Officials also on Sunday for the second consecutive day grounded aircraft for about 45 minutes due to a drone sighting. Also over the weekend a firefighter spilled fuel on his arm that ignited.

He's recuperating at his parents' home in Boise. State Highway 21 is closed from 6 miles north of Idaho City to south of Lowman. About 1,300 firefighters are battling the blaze that has destroyed two outbuildings.

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