We have a very modest food storage quantity, consisting mostly of canned foods, including many that could be eaten cold if it came to that. Allowing for the fact that, in such circumstances, you would eat what you have, not necessarily what you want, we could hold out for at least a month. That's not nearly enough, but right now, our circumstances don't allow for any more than that. We have no land to speak of, and while I used to shy away from frozen storage, I have tilted towards that out of necessity (more in a moment), and we have two freezers full of mostly convenience foods. I told my family that frozen food wouldn't do anybody much good if, say, we lost power for two weeks (as can happen in Hurricane Alley, where we are), but since my father's illness, we keep odd hours and, very often, dinner has to be something out of the freezer. We drink bottled water and my father largely subsists on generic Ensure Plus supplement (Walmart Equate brand) as he has lost the ability to eat solid food.
We have the 100-watt solar panel array from Harbor Freight (better than nothing) and it powers two outdoor floodlights for nighttime use, but if it came to it, we have a 150-watt 12/120v power inverter, which can power a couple of lamps or even a small TV set. Again, better than nothing. (I saw some smaller batteries on sale at Home Depot the other day, and am considering getting a second one, at least, if it would be compatible with solar power collection. I'll have to do some research on it, the batteries are intended for golf carts, medical equipment, and the like.) I am a sometimes ham radio operator and I have a Baofeng handheld transceiver, not top-quality but it gets the job done. We actually do not need heat about 9 months out of the year, and in the remaining 3 months, it is only needed sporadically.
I also store tap water. I have stomach issues and very often I drink club soda to soothe my stomach and to aid in digestion. Those bottles (plastic) have to be fairly sturdy, due to the nature of club soda, and when I get done with one, I fill it with tap water and store it away. It is not for drinking, though my son has a LifeStraw --- he got on a "prepper kick" of his own a few months ago, he'd been reading about the subject, and he prepared us "bug-out bags" (more for amusement than anything else) loaded with jerky, energy bars, and so on. Rather, I keep the water for hygienic purposes --- collecting rainwater is a pain in the butt, and if we had no water for a few days, it would provide ample water for basic hygiene. (If you can foresee a disaster coming, it is always a good idea to fill the bathtub with water, for flushing toilets.)
And we have guns in various calibers and a fair amount of ammo. Enough said. A couple of fairly high-powered nitro piston air rifles too, one in 22 caliber. Great fun to shoot out in the back yard!
So, to sum it up, we're not nearly as well-prepared as I would like, but we are better off than the typical American household.
Funny story: when I was a young boy, my aunt and uncle had a large basement where they kept huge quantities of canned food. Though I never said anything to anybody about it, I thought they were stocking a fallout shelter in thoughts of having to stay in there awhile. Then I finally probed into the question of "why all this food?". Well... as it turned out, it had nothing to do with disaster preparedness. You see, they were extremely frugal people, grew up during the Depression and never wasted a penny. They would see food items they liked on sale at the grocery store... and when that happened, they stocked up with a vengeance, simply to keep their food bill down. They retired comfortably, second home in Florida, so they must have done something right.