OK this is weird you ask because I am always thinkign about stuff like that not only with the animals but kids!!!
I always say if a tornado or something happens i will go into the well pump area of my house. Strangely enough.. when my house was built they dug this little cave area into the basement and put doors on. Only about 4 1/2 ft. high and 4 ft. wide and about 6 ft. long. It houses my well pump and I swear I am squeezing everybody in for an emergency! I think weird and think that because it's placement that even if the house crashed down or was ripped apart it would be safe because it is situated fully underground just in front of the house with the entrance from the basement. I told my husband I wanted a small air tube thingy run up to ground level that could open and shut incase I needed air if the house caved in.
LOL.. I have to much time on my hands if I have nothing better to do then think up wacky plans like this