CDC - Haiti Cholera

 
This could happen anywhere where sanitation is compromised.

Electrolytes

You've probably heard the term before, but do you know what they are?  Here's a pretty good explanation: http://health.howstuffworks.com/wellness/diet-fitness/information/question565.htm Adding these to your food storage and bug out bags can be inexpensive and doesn't require much space.  Gatorade powder is available at your local grocery store.