As with (nearly) all things, there's a robust subreddit and a niche industry focused on "prep" (preparation for disaster situations). Many refer to themselves as "preppers".

https://www.reddit.com/r/preppers

Some are ready for a "HTF" (hit the fan), society-collapse events. Others, like myself, focus on the higher probability but less attention grabbing situations like multi-day power outages, supply chain disruptions, and low-cost-high-ROI investments (like buying two sets of N95 masks for the family in 2018 in the unlikely event of a pandemic).

There's lot of view points within the community as to what is best, but generally the agreement is to determine what your personal level of risk tolerance is, and invest + prep accordingly.