How many people spend time thinking about what they would do if Zombies attacked? A lot, Im thinking about it right now........
The CDC wants you to think about things like having extra food and water in case of a zombie attack, what your family will do where will they go.
This is all just a brilliant allegory for any natural disaster. Swap Zombie Apocalypse with "Any Natural Disaster" and people will still be better prepared then if they hadn't been training for the Zombocalypse.
Just please do not try to headshot the Mississippi. You will only make it more angry.