Chicago flatlined...
Here's the thing about major -- repeatable -- disasters in the modern age: the city may take a hit, but it never,
ever completely vanishes. Look at any place that's had an earthquake in the last 60 years. Hell, look at New Orleans today. Oh sure, it's down by a third, but it's slowly rebounding. Chicago? With the way the rivers and the freeway system has been built in the Midwest, you can't get
anywhere in the northern area without going through Chicago. Which means that it's going to be cheaper to store stuff there. To trans-ship stuff there. Then to assemble stuff there, and then to manufacture stuff there. Cities are rebuilt, because there are advantages to having a city there.
Chicago today -- just the city -- has 2.7 million. Chicago's area has an estimated 9.8 million, which includes everywhere from Gary, IN to Kenosha, WI. Bug City was an ongoing horrible disaster, sure, but everyone tends to think that three million people could
afford to pick up and move. Simply put, they can't. Blue collar workers are going to have to stay put, because they can't get jobs elsewhere and they can't afford to even go, 'cause nobody's gonna buy their house for anywhere near what it's worth. They'll ship
in white-collar workers if they have to in order to manage the aforementioned blue-collars ...
Metro Chicago 2073 may be down from 9.8 million. Slash it by a third. But there are still going to be literally
millions of people still in the area. Remember also that the population of the Seattle
Metroplex is something over 3 million. Seattle's current metro area population is 3,344,813 ...
Easiest way to adjudicate SR4 populations is to take the current ones. Population growth has been slashed by population disasters, pretty much balancing themselves out ...