Martin - Lengthy threads about that topic back before you signed in - many good suggestions.

Perhaps think about:

1. Get out of the building items (hand, eye, and respiratory protection, plus maybe a tool or two)
2. Get out of the immediate area items (the above, plus non-descript clothing / footwear appropriate for conditions, GOOD maps, water, a couple of caffinated energy drinks)

Gets pretty crazy to go much beyond that IMHO. Oh, perhaps an alternate means of communicating with your family (assuming you already have a cell phone). That can be both high-tech and low-tech.

Tom