Read here. IPCC predictions that global warming would cause less rainfall across Africa has been proven to be embarrassingly wrong.
A peer-reviewed study examining the precipitation amounts in the country of Zimbabwe over a 100+ year period determined that median, minimum and maximum amounts were unaffected by the "global warming."
"..."author writes that there is increasing concern in southern Africa about the possible decline of rainfall as a result of global warming," with some studies claiming that "average rainfall in Zimbabwe had declined by 10% or 100 mm during the last 100 years" and stating that this phenomenon was "due to global warming."...utilized rainfall data obtained from 40 observation stations with records beginning as early as 1892 and ending in the year 2000...researcher reports that rainfall records for the 1892 to 2000 period at the 40 stations in Zimbabwe do not demonstrate evidence of changes in median, high or low rainfall during the early part of the rainy season, the mid-to-end part of the rainy season, or the whole year, noting that "other studies in Africa and Zimbabwe (New et al., 2006; Conway et al., 2008; Aguilar et al., 2009) made the same conclusion."" [Dominic Mazvimavi 2010: Hydrology and Earth Systems Sciences]