People have been trying to make modular housing work for awhile, with limited success. For various reasons, it’s a lot more challenging than it seems like it should be. One of the problems is that the US doesn’t really have a single national regulatory regime for building codes, they are mostly local and regional. You can’t really design a house that works everywhere so the economics are a lot different than selling something like a car or a washing machine.
If it keeps getting hotter and the storms keep getting worse, we will find out. At the very least, property prices anywhere still liveable will likely become even more unaffordable.