Invitation

Even though the Red Cross has opened up multiple massive shelters for the survivors of Hurricane Katrina, it is imperative that people are moved out to smaller accommodations.
Large, anonymous masses of people afford opportunities for criminal elements, or much worse kinds of predators.
Many people are opening their homes without any question or fear, but just as the dead float in the flooded streets, some still walk them.
Whether voodoo zombie or vampire, protections against inviting undead into your home should be in place. I’d suggest greeting your new roommate with plenty of garlic and exposed mirrors.
In daylight.