The US Centres for Disease Control and Prevention (CDC) has published information on how to prepare for a zombie attack.
Somewhat tongue in cheek the CDC decided to use the concept of preparing for
a Zombie attack as a means of widening the range of it's disaster preparedness
messages. Apparently it worked.
Those who are suitably prepared for a zombie
apocalypse "... will be prepared for a hurricane, pandemic, earthquake, or
terrorist attack." The information required to do this is available here, and may be a useful way of engaging the minds of those who might otherwise not bother.