If you’ve ever been to Phoenix, you’d wonder how they ever got into bubble territory in the first place. The only reason the whole city doesn’t blow away in a dust storm is because they’ve diverted the Colorado River to bring water to their pools (which you need in 115 degree heat) and landscaping.
When I lived in Phoenix, one day it was so hot, the planes couldn’t take off for a several hours from Sky Harbor Airport. The reason was that the jet’s engines had never been tested for takeoff in the extreme 115 (or 120) degree heat of that day.
There is land as far as the eye can see. It’s hot and dry. It’s not a center for high-paying jobs. I can see why SD was raised to bubble status, but Phoenix and Las Vegas? It makes no sense.