In my many decades on this planet (here in L.A.), I've seen riots, EQs, fires, dought, lots of rain, etc.
I like to keep enough of the usual stuff around to get thru the few weeks after an "event" until the govt. help arrives---don't want want to be like the Katrina folks holding up their starving, sweaty, thirsy babies to the news choppers screaming about not having any help or food.
Carrying things a bit farther, I plan to have enough on hand to help/trade/share with my local friends---you can't get thru these hard times without help from your local friends and family.
No, I am not planning for the End of the World!