How global heating supercharged floods in West Africa, displacing thousands

The recent floods in west Africa, which claimed dozens of lives and displaced thousands, were a stark warning sign of the climate catastrophe unfolding on the Gulf of Guinea coast. The World Weather Attribution team has concluded that global heating supercharged the rains that caused the devastating floods, turning what should have been a manageable event into a full-blown disaster.

The countries affected by these floods – Côte d’Ivoire, Ghana, Togo, and Nigeria – must adapt to a new reality where extreme weather events like this one will become increasingly common. As Friederike Otto, a professor of climate science at Imperial College London, noted: “The climate is changing faster than most nations can adapt.” This has sobering implications for the region.

Global heating has increased the likelihood of heavy rainfall events in the Gulf of Guinea by 23% since record-keeping began. The scientists warn that these events will become more frequent and intense, with similar-scale floods expected to occur on the Gulf of Guinea every two to four years, given the current climate trajectory. This is a harbinger of a future where extreme weather events like this one will become commonplace.

The people living in these countries already know that heavy rains are a possibility during the rainy season, but not usually of this magnitude. The surprise and severity of the recent floods caught even seasoned residents off guard. Climate models typically struggle to capture the full scale of tropical precipitation trends when it comes to extreme events like this one.

This highlights the limitations of our current forecasting tools – and the urgent need for better climate-resilient infrastructure. The World Weather Attribution team’s findings also underscore the need for international cooperation on climate justice. As Joyce Kimutai, lead author of the study, pointed out: “Industrialised nations have a responsibility to help nations like Togo, Côte d’Ivoire and Ghana adapt to a worsening problem they didn’t cause.”

The cost of climate-related disasters is already substantial, and will only continue to rise unless we take decisive action. Governments in the region must invest in climate-resilient infrastructure and adaptation measures, including upgrading drainage systems, building more robust sea walls, and implementing early warning systems for extreme weather events.

But these efforts must be accompanied by a global commitment to reducing greenhouse gas emissions – a crucial step towards mitigating the worst impacts of climate change. The Gulf of Guinea floods are part of a broader pattern of climate-related disasters unfolding across the world, from California wildfires to Australian bushfires.

The scientists warn that “until emissions stop, these extremes will only grow worse.” The clock is ticking – and it’s time for action.