But a large part of that region was known as the Great American Desert before the invention of suitable irrigation. And water is being removed from the aquifer much faster than it is being replaced.
Yes, things that can't continue forever, won't. Eventually much of the Great Plains will be native grassland again. That is its natural condition. The parts of Arizona and California that currently host alfalfa fields will be actual desert again, and the dairy industry will return to the Midwest where it belongs.
Even when being hyperbolic, however, you could move your border west a whole state. I doubt Minnesota, Iowa, Arkansas, or Louisiana are any more worried about the next Dust Bowl than we are. My impression is that Missouri is the driest of the states on our longitude.
But a large part of that region was known as the Great American Desert before the invention of suitable irrigation. And water is being removed from the aquifer much faster than it is being replaced.