It just makes sense to have at least some weeks (or better months) worth of dry stores and canned goods stocked up all of the time. Quite apart from some zombie apocalypse, there are any number of civil emergencies, from earthquakes, storms, volcanic eruptions, or whatever that can happen.
I carry a go-bag in my vehicle that I can live out of for a week or so, until I can get home, which is my primary hole-up location.
They'll keep you alive