According to the media, it's the governments fault for going after looters, instead of ordering domino's pizza and passing it around to the "hungry" people (who weigh 400 lbs) media are interviewing who haven't eaten for a day, because they were too busy carting off loot.
Safe water may be a problem, but judging by the bodies I've seen in the hurricane coverage, it will be about 6 months before starvation becomes an issue.