Remins me of a SAR operation where we found our victim sitting cold and clueless in a damp chilly forest. We suggested that a roaring campfire would be nice - answer: "It's too wet to light a fire" We took a carbide headlamp (normal equipment on a night search in those days) stacked some small stuff around it, and enjoyed welcome warmth in no time at all. We didn't even have to use boy scout starter fluid...