Even if you were correct about the apocalyptic scenario, your assumptions of no power, no law enforcement, no transportation, no medical care are naive, to say the least.
That's like saying that roads won't be cleared after a winter storm until the government gets there.
We are a self-governing people, in large measure, and actually do better with government out of the way, so I would say that there will be some power, some medical care, certainly law enforcement, if of only a frontier type, and many other things, because people can do those things on their own, locally.
/johnny
We are a self-governing people
Spirited: To be self-governed is to be self-disciplined, meaning that one’s disordered passions, appetites, and emotions do not control one’s thoughts, words, and deeds.
That increasing numbers of Americans at every level of society are “out-of-control” rather than the reverse is everywhere evident. And when the out-of-control outnumber the self-disciplined the idea of a self-governing people is dead and must be replaced with tyranny.