Preparing for a Natural Disaster

Even if there's no civil war, close to 100% of the people listening to this will be hit by a natural disaster at some point in their lives. Keeping a sensible stockpile of dried food, water, and medication has zero downsides other than the upfront cost. But stockpiling can only take you so far. What should you actually do if order breaks down, the police retreat, and your community is left to fend for itself? I've never been in that situation, but Scott Crow has. You ever heard of the man in the mask?