Start with the hard truth about king snake shelter
Most emergency shelters, hotels, and boarding kennels that welcome dogs will refuse a king snake, so finding shelter means building your own list long before smoke or floodwater forces the question. Call reptile rescues, exotic-animal veterinarians, herpetological societies, and snake-keeping friends outside your immediate area, and ask each one directly whether a nonvenomous constrictor in a locked tub is acceptable. Write down who said yes, their address, and what they would need from you. A friend two towns inland who has already agreed beats a dozen hopeful phone calls made from a traffic jam.
Pick two routes, not one
A king snake evacuation plan needs a primary route and a second route that shares no bridge, low road, or single highway with the first, because the emergency itself often closes the obvious way out. Drive both routes on an ordinary weekend and note fuel stops, rest areas where you could safely check the tub without opening it in public, and the point where each route leaves the danger zone. Save both destinations — your confirmed shelter contacts — against each route, since the direction of a fire or storm decides which host is reachable. Keep the plan on paper in the car as well as on your phone; a flat battery should never be the reason a calm snake ends up on a risky detour.
Set up the travel tub before you need it
A king snake is a committed escape artist who will test every lid seam with his nose, so his evacuation tub needs a genuinely locking lid, air holes drilled high on the sides, and a plain layer of paper towel he cannot burrow out of sight in. Keep the tub, a pillowcase for calm handling, a spray bottle, and a spare thermometer stored together beside the enclosure, not scattered around the house. If a storm is forecast, stop feeding a couple of days ahead: a king snake carrying a fresh meal into a bumpy, stressful car ride is far more likely to regurgitate it, and a tub fouled mid-journey helps nobody.
Keep him warm, dark, and unhandled on the road
A king snake in transit needs steadiness, not entertainment, so the tub rides on a flat surface out of direct sun, covered with a light cloth to keep the world dark. In cold weather, tape a hand warmer to the outside of one end of the tub with a cloth barrier, never loose inside where he could lie directly on it and overheat. Do not open the tub at rest stops to show him to anyone, and do not offer food or a water bowl sloshing around the car. At fuel stops, glance at the thermometer through the plastic and confirm the lid latches are still fully engaged — king snakes find the one latch that is not.
Rehearse the handover, not just the drive
Once a year, run the whole plan at walking pace: tub out, snake in, lid latched, car loaded, route chosen, host texted. Time it, and fix whatever slowed you down — the tub stored behind paint cans, the rescue whose number changed, the friend who has since moved. Tell your confirmed hosts what a king snake actually needs in temporary housing: a secure tub or tank, a warm end and a cool end, fresh water, and absolutely no co-housing with other snakes, since king snakes are named for eating them. Keeping his size, temperament notes, feeding history, and temperature range together in KinsLe as a Pet Passport lets you hand that whole briefing to a host in one send, so his care stays identical even when his keeper changes.