North Texas could become pretty tough, weather-wise.
Hope your aquifer/well is sturdy as well.
We are north Georgia and could shift normal crops to those normally grown in Wisconsin.
Plus the greenhouses ...
I've read that everything 45° North and above is going to be snowbound year round. We're at 32° North, which causes me to think we'll still have four distinct seasons.
Winters are mild at this latitude. I figure the worst that will happen, is North Texas will get snow every year. We'll still be able to grow crops, thank goodness.