In the aftermath of Judgment Day, we fled to the Exclusion Zone and sought refuge underground. This is what is left of our fallen civilization.

Which cities are people leaving and where are they going

https://www.nytimes.com/2018/12/20/realestate/which-cities-are-people-leaving-and-where-are-they-going.html

It is odd to read about the transit of populations between cities that are long lost.