Good points.
I did research using dry ice in a walk in and the hazard.
These particular sites were very informative:
https://www.philadelphiadryice.com/how-much-dry-ice-do-i-need/
The amount of dry ice recommended varies a bit between sources.
Individuals online have had very good luck with one block of dry ice lasting an entire week.
The dry ice is in the "short term" options of the list.
A generator is definitely the best option. Multi fuel which can run on propane or gas is a better option during a prolonged power outage.
Our power outages in town very rarely last for more than 2 days. In rare instances, in some isolated pocket areas, no more than 7 days at the most.
I wanted the list to be encompassingly comprehensive so that Everyone, the restaurant workers and their families, would have an idea of what options they all might have for saving food in their personal home refrigerators and freezers. The dry ice could be a sweet spot for some of them to consider. Also for if their unit breaks while waiting to buy a replacement or get repair on it. It seems dry ice availability has been on the decline.
However some cities might have an abundance of dry ice suppliers/makers.
If there is a dry ice warehouse or if they start trucking it into the city during a big power outage, dry ice might be what many are using during a crisis. It might be easier for authorities to truck or rail road in dry ice, then to give every a band new complicated generator which needs hard to get fuel that no one has.
The word generator seems to encompasses solar and battery generators.
The restaurant has 2 ice machines with bins. I wanted staff to know that using that ice can prolong the time in the units if placed inside in a large container(s). I wanted people to know that ice is what we use to use to keep food cool before the 1935's. It's our history. Ice boxes were small because they needed to be to conserve how much ice was needed and didn't keep food quite as cold as our modern refrigerators did. The food in them didn't last as long.
I also wanted people to know it is possible to feed rinsed or cooked spoiled food to dogs. Dogs have to eat too during a power outage. Also if people realize they can feed some of it to their dogs, they won't feel so bad that the food and their money is going to waste and so want to try to save it and eat it or feed it to humans.....
I also wanted all the info to be printable, to fit on one side of a sheet of paper, in a larger 24 font size.