The two real (insurmountable) problems are: FOOD and FEMA!
I kind of agree with you on FEMA, but as far as food goes, I think our neighborhoods is quite well prepared for several reasons.
1. A river runs through it. Okay, actually along one side, but I liked that phrase. Along this river on either side is thick pine woods filled with feral hogs, deer, raccoons, possums, beavers, armadillos, squirrels, rabbits, ground hogs. The river has bass, sunfish, catfish, crawfish, alligator gars, turtles, clams, cranes, herons, ducks and assorted other fish/fowl. The woods are filled with all sorts of edible plants just about year-round. Blackberry and dewberry picking starts next week!
2. One of my hobbies is gardening and I've helped a lot of neighbors design their landscaping. Once everything is planted I casually mention how all the plants I had them put in are actually edible (hibiscus, daylillies, canna lillies, elderberry trees, loquats, sago palms, etc..). I have a
post on my blog about this particular subject.
3. There are tons of Sago Palms in the neighborhood (see #2). Each one is LOADED with starch, enough to last many, many months.
4. It's Houston. We have lots of bugs all year long...
5. There are many open lots available for planting, including a 100-foot wide buried pipeline easement and a 150-foot wide powerline easement. Both strips get plenty of sun and the power and pipeline companies have kept them well mowed/groomed. We'd have to be careful digging, but that's okay.
6. I know of five families (including us) on just my block who have vegitable gardens in their backyards. Crops include zucchini, tomatoes, corn, sunflowers, egg plants, okra, spinach, strawberries, peas, beans, onions, peppers (bell and hot), limes, lemons, bananas, figs, and pecans. I'm sure more than just us five have gardens.
7. Stray cats. Lots and lots of stray, feral cats.
A few years ago I trapped THIRTEEN of them and took them to the animal shelter. The numbers has sprung back up.
8. Birds. One thing my trips to China have taught me is that if it has wings it's food! A simple but effective bird trap can be found
here. It may take a lot of grackels/robins/sparrows/magpies to make a meal, but at least around here there are lots to begin with.
True, it'd still be a lot of work and attitude changes but I think our neighborhood could feed itself. Harvesting plants/animals from the woods would be dangerous at first as many other would probably set up squatters camps there. I suspect the mosquitoes, heat and occasional flooding would drive them out pretty quickly though...
Food is around, you just have to look and be open-minded (sometimes very open-minded).
-Blast