I recently put this link in another post but found it to be so comprehensive that I wanted to give it its own post. It breaks down how to survive in the event of a:
*Nuclear attack
*Biological attack
*Chemical attack
http://danger.mongabay.com/survival/afm/23-02.html
These types of things can happen whether natural or man made and its important to have not only a survival kit prepared for your family member as well as a plan in place if or when disaster strikes. The only saying has always been I'd rather have it and not need it, than to need it and not have it!