A surge of rainfall across the Sahara Desert could transform vast stretches of Africa before the end of the century. Nonetheless, scientists warn that this flood from gushing rainfall, could bring as much risk as reward.
New research from the University of Illinois at Chicago, published in NPJ Climate and Atmospheric Science (2025), projects that parts of the Sahara could receive up to 75% more rainfall by 2100. The modelling, which combines forty global climate simulations with half a century of satellite and ground data, points to a dramatic shift in how, when and where rain falls across the continent. This is not simply a green Sahara revival. It is a reshaping of the African monsoon, with consequences that could touch everything from agriculture and migration to urban planning and regional diplomacy. Watching for the science behind the storms.
The models reveal two driving forces; a warmer air, which can hold more moisture and a northward drift of the Hadley circulation, known as the vast atmospheric engine that moves tropical rain belts. As oceans in both the Atlantic and Indian basins heat up, moist air is pushed extensively into the Sahara, triggering more intense convective storms rather than gentle seasonal rains. By the late century, much of central and southern Africa is also expected to grow wetter by between 17% and 25%. While the far southwest could dry slightly. As this is a continental reshuffle of rainfall, and not every region wins. A situation where more rain means more trouble.
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