Instead of just worrying, start preparing for the worst, and if it doesn't happen you will be that much further ahead. Start making lists and figuring out what could go where, who could help with any moving and if you could store stuff somewhere for awhile, or what order you would like stuff packed and kept (so the last stuff would be the least you cared about). Call the SPCA and ask about ways/means for the kitties; they could have/find someone to "foster" them for a couple months until you are in a position to get them back. Think of a few things to do/find out that will help you in the future if you need the information.