I lived in LA for 7 years and experienced a few 3.0+s on older four-floor or so apartment complexes. Now I'm living ~7 miles away from a fault in the bay area. Always have water and supplies. And I hope ad-hoc/mesh wireless networking technology takes off sooner rather than later. http://www.wired.com/2014/03/apple-multipeer-connectivity/
> And I hope ad-hoc/mesh wireless networking technology takes off sooner rather than later Are you familiar with the Serval Project [0]? These guys are working on exactly this solution, for exactly this (and other similar problems). [0] http://www.servalproject.org/
Drones, a la Facebook, might also be a solution under severely damaged infrastructure, it occurs to me now.