We do have a lot of refugees, but certainly the climate is the least cause. According to NASA the Sahel is getting greener. 
Greenhouse gardeners say that the raised CO2 levels make plants grow better and there is generally more moisture in the air.  Political strife wars and extremism caused to a great extent by uncontrolled population growth are the major reasons. And then of course some people, who are not even all that bad off,  are just fed up with uncertainty and life in poor smelly and dirty countries and want to live in any of the rich countries where they promise themselves effortless wealth. 

I know that the climate is changing, after all it always has been changing, and I am convinced that man is in part responsible for it, but these catastrophic prediction by self proclaimed climate scientists are often just too ridiculous for words. 
The other day I read about 2.5 meter sea level rise by the turn of the century - about 30 centimeter per decade - what a lot of codswallop.