I've done lots of reading about both human history and geological history and less consistent weather is something I am already trying to plan and prepare for.
May I suggest you read lots of the threads on this list: Dr Redhawk's soil series:
https://permies.com/wiki/redhawk-soil
More resilient soil with healthy microbes and a good amount of carbon in it, may help plants survive what otherwise would kill them.
Gabe Brown is in a different ecosystem, but he's got some good info on mob-grazing and building soil. I recall there is someone else doing farming following similar principles in an ecosystem more similar to yours, but a) I'm Pacific wet-coast, so I maybe didn't pay enough attention to the particulars, and b) I'm poor at names at the best of times! However, Uncle G--gle is your friend!
I'd also do some reading in the biochar forum. In some ecosystems (mine at least), biochar can help with carbon levels and soil water retention and resilience.
https://permies.com/f/190/biochar However, if you go this route, please try to use waste stream material. My current source is a mixture of sawdust from a friend's mill layered with fir cones.