This is what a 4ºC warmer world will look like.
Sorry about the resolution, but you get the idea, green is better than brown. All the yellow and brown areas are essentially uninhabitable. Canada and Russia will be asked to accommodate the 3 billon people displaced from the other areas.
From a talk by one of Canada’s most eminent environmental scientists, William E. Rees: The Vulnerability and Resilience of Cities.