California has been in drought for 9000 of the last 12000 years. It's the normal state there. Switch from avacado to chia, and you'll be fine.
The Midwest is another story. We've been planting our favorite foods there so long that we've destroyed the ecology of the place. Thus the "Dust Bowl" phenomenon.
But there is one way to deal with this- bunch grass grazing. It's working well in the Eastern Oregon Desert; but it's hard to manage.
Adapt, work with the ecology, not against it, with climate change, not against it. The earth will survive, human beings are not guaranteed to; but we do have one advantage- invention.