I'm not in a part of the country that evacuations are really a concern, but we have some emergency gear for power outages. The theraputic heat packs you can get at most drug stores are great if you have a lot of snakes since they last so long and don't take up much space. Won't keep a tropical reptile at high enough temps long-term but warm enough to avoid any problems for a few days. We get the ones that you can activate by breaking something inside them in case there's no electricity or microwave to heat things.