SHTF - Cascadia Quake
This is what I expect in my locale. Big, big storms come and go, but the Cascadia quake is coming, someday, and is about due. For me, it means keeping my jeep full of fuel should the Tsunami flood up the Columbia and Willamette Valleys. I can hit high ground in a matter of minutes, but I may have to navigate through some fields to do it. The traffic is already nasty here, I can imagine gridlock beyond belief. I live in some fairly low land, so abandoning the home may be a real concern, but still is not likely.
Beyond that, I try to keep a few days worth of kerosene around for the Kerosun heater. That little bugger rocks and I can heat my uninsulated double car garage with it, it can keep the house plenty warm and a single room downright skivvies only toasty.
As far as defense concerns, I have that covered with plenty of semiautos should that need arise. And I'm fairly in line with my neighbors in this front, so watching out for each other would be a coordinated effort. We all have 4x4 rigs, so escaping by a non-traditional route could be a reality if the water does not moat us in in our area.
Food, got plenty, but losing power means no fridge, so this could be an issue. We have large coolers that would get us by, but for extended time I think we'd need to score some dry ice. BBQ is almost always topped on propane and the wife keeps plenty of meat in the freezer. Loss of power would mean a big cookout to prevent a big loss. We always have several days if not two weeks worth of food on hand. I think I'll be fine, but then again, you can't think of everything.
I don't live in the city proper or even close to it, I'm a suburbs guy, so should anarchy and chaos break out, it will be me and my neighbors banding together. And I think we all have enough firearms to form a nice perimeter should it really come down to that. Black semiautos appear much more menacing to would be looters than bolt guns.
But then again, if Katrina is any indicator, CCW will be key because the police and national guard will want to come take them from me. I don't think I'll answer the door.