I'm a city boy (San Francisco) and I'm definitely staying put. I live in an older house, built in the 1920's, and lucky to have a fireplace. Definitely cozy when it's stormy outside.

Check out Tom Brown's "Field Guide to City and Suburban Survival." It has a lot of practical ideas for making do, with what's available. In particular, his diagrams for building an insulated shelter with furniture and mattresses is great. There are a lot of resources in urban areas. I just hope I don't have to end up hunting and eating pigeons ;-(.

Your local CERT organization is a good place to get started. They have classes/drills for disaster planning/recovering, including emergency HAM communications. There are a lot of good people thinking about urban survival, especially in earthquake country. Get to know your neighbors, so you can rely on each other if the SHTF (including watching out for the bad guys.)

Hope this helps,
Lynn - W6JAE