Oh no! I don't see why you would have to close really. Will there be a lot of construction on your property? I'd mention to the parents since there will be other people at your house. If there's water for drinking and you can clean up messes with wipes etc., then i can't see it being a problem, especially since it's being fixed tomorrow.. If you close, it's short notice for parents which may be difficult for them to arrange alternate care. Also, I would think you can claim part of the repair as well for taxes. Good luck!