You know, if I actually did have 30 minutes warning of a disaster, I'd go buy chocolate. I am simply incapable of keeping an emergency supply in the house. No trouble keeping my hands off the canned chickpeas though
Remember during a disaster once everyone is done running in circles and screaming, there tends to be a lot of sitting around - might as well make sure you have supplies of your distraction of choice available. Escapist fiction is also good