Flames rushed skyward from a structure less than a mile away across the sagebrush. At the height of another dry desert summer in July 2013, Chris Tucs, a novice member of Carson, New Mexico’s volunteer fire department, was working in the yard of his off-grid home when he saw the blaze. He threw a few shovels into the back of his truck, hitched up a trailer loaded with 300 gallons of water, and sped to the scene, looking up from navigating the ruts in the road to see flames shooting through the…