Well I believe the droughts and wildfires are not really occurring in Siberia, which is the area I think some are speculating will become a breadbasket.
Living around Seattle, I disagree, lately there have been articles just about every year about wildfires or drought in Siberia, and many about those fires causing smoky skies in Seattle.
Siberia has awful soil that doesn't have nearly the nutrients necessary to support large scale agriculture even if the temperature shifts. You could fix that, but it would take the same amount of time as trying to fix climate change (at least on a big enough scale).
Edit: I was wrong.