So I have a small two burner camp stove (think it was under $30 at Walmart) in the attic that uses those small propane or maybe butane gas canisters. I'd move that outside (never inside) and warm up a large pasta pot of water up to just aboveQuote desired temperature, then move it off the heat and put the bags in there to warm. Again don't warm on the lit stove so as to not burn the bags and error on the side of not hot enough versus to hot. Also I'd be worried about contamination of the bag entry points so something would need to be done to disinfect those once exposed to water.
would try to get to the nearest clinic/hosp to plug in the heater and do manuals.
I'm afraid that submerging the bags in warm water is frowned upon.