Wine is not usually listed as a disaster kit item. It's notable, however, that before clean drinking water became widely available, it was safer to drink beer or wine, because the alchohol kills pathogens.
Also, a number of scientific studies have found that, in moderation, alchohol consumption can actually benefit health, wine in particular. And, of course, in a stressful situation like a disaster, its psychological benefit should not be underestimated. :-)
So, let's say you're in an emergency situation, and you don't have a supply on hand (or have already used it up). Who you gonna call?