I will cheerfully admit to feeling a little smug that some months ago, I laid in an emergency supply of drinking water--a total of 16 liters, which at current rates of consumption should keep me in coffee and herbal tea for some time yet.
I took this step as a response to an emergency preparedness workshop at my local library, put on by the City of Vancouver to help residents understand how to prepare for an earthquake or what-have-you. Highly recommended, by the way.