I have a border creek between my property and another, it’s close enough in an emergency to access. I’ve done that in years past, long time ago. It seems that keeping water a long time is not necessary, six months, then replenish before every winter, if necessary. Accumulate new containers and repeat, those who do not repeat/control their supplies are asking for trouble keeping stuff too long...then you deal with mold and bacteria.
I think we have some opportunities to catch up, if something happens, a few days maybe except for food as that must be maintained sensibly...
City dwellers have the most risk and must be prepared continually, as life can change almost instantaneously in high population areas.
Don't buy foods in "easy Open" cans, with the ringtop on top of the can
The "easy open" can is NOT designed for long term food supply, even if it is a known Commercial brand,
if you have the choice, go for the 'off brand', or 'store brand' in a regular can, because it is properly sealed and will store for a longer period of time.
Always ROTATE your canned goods; keep an inventory according to expiration date; they are still good beyoond that date, but maybe not quite so tastey.
Store what you eat (not exotics), and eat what you store.
Also, remember the "Prepper Rule" that one is none, two is one (always have a back up) whether it be a can opener, bottle opener, batteries, flashlight, etc., etc...
Always have a backup plan ....always ....always !