Without concrete climate and development action, the five Lake Victoria Basin countries could see between 16.6 and 38.5 million people moving within their countries in response to water scarcity, declines in crop productivity and ecosystem productivity, and sea level rise, augmented by storm surge. 

This report, part of the Groundswell Africa series, reaffirms the potency for climate change to drive internal migration in the Lake Victoria Basin. The results described in this report are based on the application of an enhanced version of the pioneering Groundswell model with a more granular analysis and additional features better placed to inform policy dialogue and action. 

The analysis also includes consideration of nonclimate factors. The countries will see an emergence of climate in- and climate out-migration hotspots, as early as 2030, but with continued spread and intensification by 2050. Concrete climate and development action could reduce the scale of internal climate migration across the Basin countries by 30 percent. No country in the Lake Victoria Basin is immune to internal climate migration, but there are differences among countries depending on their demographic, economic, and climate trends.