What's your worst disaster? Can you top mine, which was deciding to establish my plot in a backyard spot that once had been a driveway? Let me hear from you at: http://www.theseedsofspring.com/blog.php
No, I can't top your disaster. I have a small back yard garden and I run into the run of the mill problems, pests, animals and bugs that all want my stuff. It's a war out there. However, I manage to grow and harvest something each year.
There is a movement in urban gardening and the link below may be of help. Good Luck.
Here is a link that might be useful: Urban Gardening