DFW is another such megacity. The construction happening there reminds me of parts of China.
DFW is going to be in a world of hurt when the water runs out and that day is coming somewhat soon. There are already places in central Texas where the aquifers are dry and the lakes don't refill during the formerly-rainy season. North Texas is reliant on a set of manmade lakes that are already slower and slower to refill, with more and more taps being added every year.
In my first round of interviews out of college I interviewed with a company in Dallas. It was going well, but towards the end of the day I was frank with my interviewer and told them I simply didn't want to live in DFW. I didn't have another offer yet, but I found one in Austin and moved there.