Try Spain, for example. Wikipedia: "Over 30% of the area is already severely impacted by desertification". Agriculture will depend more on irrigation, and there will be less water available.

There will be enough food for people to live there, yes. But agricultural yield is expected to go down by ~20% or so if emissions continue. And people sitting in worse spots are not just going to sit there and wait for the flood and die. There will be wars about who gets the resources from the new best places.