Take him with you if you evacuate.

I always have a tub w/ventilation holes, rheostat, and heat mat available for whatever reason I might need one. I like to transport most snakes in pillowcases with an overhand knot tied at the opening, and then place the snake-in-a-pillowcase in the tub with the top on. This works particularly well on snakes that aren't noodle corn snake hatchling-sized snakes.