You got that right. They stepped up and they got good PR for what they DID. I will certainly remember their helping hand to a community in need when it comes time for me to do my Christmas shopping.
I saw pictures of one very large Wal-Mart that had at least 5 feet of water at it's door.
Everything is ruined anyway and all non-preservable food will be rotten in a day so it only makes sense.
If it only makes sense and if it is good for public relations, just open the doors and walk away. It only makes sense.