Well, this is it. The green bits and blue bits are the lucky places. Yellow through violet are where it's going to be really tough to survive. This is a picture of global mega-drought. It comes from the U.S. National Center for Atmospheric Research. These models are based on the 'moderate' model from the IPCC. That is based on atmospheric CO2 concentrations of 500 ppm by 2050 and 700 by 2100. But, given the way we're going, we're actually headed for 1000 ppm by 2100 so the horrible drought map below may actually be a rosey projection. Click on chart for larger version.
Now to give you a better perspective of this map, the worst drought in recent memory was in the sub-Saharan Sahel region. It ranged between a -3 and -4 on this scale. By mid-century we're looking at some very heavily populated areas including the Mediterranean basin, much of central United States and Latin America rocketing into the -10 to -15 range. The orange and red bits will be merely heavily stressed.
By the way, the NCAR sees the global drought actually showing up beginning around 2030. No one is going to escape the fallout from this. See all those glowing parts of the United States? Well the people who live in those parts are going to be looking for other places to live. That means massive climate migration. Now, look at that map again. If you lived in the American south or west, where would you be headed?