Around here the most likely disasters are floods, tornadoes and severe winter weather.
I try to keep about 2 weeks of food in the pantry, rotated regularly. Some of it is in cans and could be eaten cold. Some of it just requires boiling water. We dug into both during last year’s tornado which knocked out power in our area for a couple days and made getting around difficult for a bit due to debris in the roads and flooding from the storm.
We also dig into it during severe snowstorms. Strictly speaking, we haven’t really been snowed in completely while we’ve lived here, but I like being able to stay inside and off dangerous roads if I don’t have to go anywhere.
We could set up a fire pit out back and I know how to cook over a campfire, our biggest problem would be a lack of (safely) burnable stuff.
We have emergency lighting. The building will hold a livable amount of heat for at least a few days. it is very well insulated. By closing off everything but the bedroom and wearing lots of clothes we could probably keep that one room livable for people in a winter-camping type situation - if nothing else, it would be out of the wind - the big difficulty would be keeping our pet parrots warm enough to survive. We’d probably pack them into their cages and pile on the blankets (leaving some ventilation) and hope their own body heat will build up enough to do the job. At which point we’d have a day or two to think about assembling survival equipment/bug-out bags/working on transport. Myself, I could strap on my cross-country skis and walk out when the weather clears - my disabled husband, well, maybe we could rig up a sled I could pull. It would be slow, but if we were only going a mile or three it could be done.
Tornadoes are over and done with quick. You don’t get weeks and weeks of problems, power gets restored in a day or two - unless your house is completely demolished. But that’s not something you run from. The sirens (or whatever) go off, you find cover, then when the noise is over you start picking up the pieces. Tornadoes range from just knocking the shingles loose to scraping the foundation clean. They area of devastation is not huge areawise, so it is relatively easy to go get help, or for help to get to you afterwards. If you’re equipped for a blizzard you’re good for most after effects of tornadoes.
Floods are a problem. Fortunately, we’re on what passes for high ground around here, not that that is saying much as we’re definitely on some very flat land. The down side is that by the time water is coming under our door the local roads will be flooded out. In which case we grab what valuables we can and head up to the second floor. If the water reaches the second floor, well, by that time the neighborhood would be draining into Lake Michigan in which case I think we’re doomed.
If we have to get out of the neighborhood, our valuable documents are all in one place, we have cages for the animals, and can throw a couple days of food and water in the car. Unfortunately, our truck is broken right now and we haven’t the money to fix it, so we’d have to abandon it. If it was working we’d load two vehicles and get out.
Our biggest problem is water - we have a well, and with no power the pump doesn’t work. We do keep some on hand, and there’s a reserve tank plus, if we’re careful, we could drain some out of the building plumbing, too. Enough to live on for a week IF we’re careful. Unfortunately, post-tornado a drunken neighbor managed to flush nearly the entire reserve down the toilet (literally) through inebriated stupidity, then came pounding on OUR door screeching there was no water and demanding we DO SOMETHING about it. Idiot.
Oh - and we have buckets we could use as chamber pots, if it came to that. And bags. Probably would throw it in the dumpster, or pick a spot in the yard, and it would get smelly and we wouldn’t be able to wash for awhile but we could probably camp out for awhile if we had to. Water access is the biggest issue, really. In winter there’s snow. We could set out rain buckets. There are some local ponds I could probably get water from and boil it - except everyone else will have the same idea.
The other problem for us would be the husband’s medications. Running out would be a problem. It won’t kill him immediately, but it will severely complicate the situation and will have long-term effects.
In summ - for most situations we’re planning to stay put for awhile. We’d have a couple days to make alternative plans to go elsewhere if we had to.