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One quick thing to consider. It doesn't make it onto a lot of "lists" but it is important if you plan to "bug in" or shelter in place to ride out a temporary disruption.

Sanitation/waste disposal.

Anyone stuck in a city/suburb without running water for even a few days will be dealing with a major problem once the toilets stop flushing. There are several "bucket with a seat" style commodes available, with disposable liners. On the plus side, you can store other preps in them until you need to use it.

I only mention it because it is something that I personally overlooked for a long time, and rarely see mentioned.