Leaving the settlement in case of emergency

⠀The first thing required is to determine that the city must be abandoned. Of course, you won't be able to determine this in time. But if you realize it before anyone else, your chances of leaving the city safely increase. ⠀The first question that arises: and why actually need to leave such a warm and comfortable city. The answer is simple - absolutely no reason, now. ⠀But our infrastructure, especially urban infrastructure, is so vulnerable that if it collapses, a person in the city will not survive, at least most of them. After all, the city does not produce food, constantly requires energy both electric and fuel, plus continuous supply of water and sewerage services. Now imagine if one of those things were to disappear. ⠀ So, let's...