If we don't get some sort of development with ghost-girl being caught on camera, I'll be really surprised.
Dry cat food contains all the essential nutrients to keep a cat going – but it works for humans too! Keep some in your emergency supplies. It tastes awful, but it beats starving!
Keep some cat litter around in case there's no water to flush the toilet. Put a plastic bag in the toilet after it's run out and pour a bunch of cat litter into the bag. It is now human litter. I go with purina tidy cats because it's lightweight and worked well when I actually had cats.