Climate change and urban pressures intensify flood risk on the Gulf of Guinea coast

Between 20–22 June 2026, the Gulf of Guinea coast experienced severe flooding following intense rainfall, with over 140 mm falling in less than 24 hours in some areas. The event caused significant fatalities in Côte d’Ivoire (59 since May), Ghana (at least 34), and Togo (five). An attribution study found that observed 3-day rainfall intensity in the region has increased by approximately 23% since records began, making such events about five times more likely in the current climate (1.4°C warmer than pre-industrial levels) than in a cooler climate. While climate models support the trend of increasing precipitation, they systematically underestimate the observed increase, with models showing only a 4% increase in intensity. The study highlights that rapid urbanisation, the expansion of settlements into floodplains, and sea level rise exceeding the global average have compounded flood risks. Under a future warming scenario of 2.8°C, these heavy rainfall events are expected to become common occurrences.

• Heavy rainfall between 20–22 June 2026 led to deadly flash floods across the Gulf of Guinea coast, with at least 34 deaths in Ghana, five in Togo, and 59 in Côte d’Ivoire since May.
• Observational data indicates that 3-day rainfall intensity in the study region has increased by about 23% since records began, making an event of this magnitude approximately five times more likely today than in a climate 1.4°C cooler.
• Climate models generally support the conclusion that rainfall is increasing but underestimate the magnitude of the change, showing only a 4% increase in intensity compared to the 23% observed increase.
• Flood risk is intensified by non-climatic urban pressures, including the conversion of natural vegetation to croplands and the expansion of formal and informal settlements into floodplains, as well as sea level rise that exceeds the global average.
• In a future scenario where global temperatures are 2.8°C higher than pre-industrial levels, climate models suggest that wetter 3-day periods will become common occurrences.

APA

World Weather Attribution (2026). Climate change and urban pressures intensify flood risk on the Gulf of Guinea coast. https://www.worldweatherattribution.org/climate-change-and-urban-pressures-intensify-flood-risk-on-the-gulf-of-guinea-coast/

Chicago

World Weather Attribution. Climate change and urban pressures intensify flood risk on the Gulf of Guinea coast. 2026. https://www.worldweatherattribution.org/climate-change-and-urban-pressures-intensify-flood-risk-on-the-gulf-of-guinea-coast/.

Wikipedia

{{cite report |author=World Weather Attribution |title=Climate change and urban pressures intensify flood risk on the Gulf of Guinea coast |date=16 July 2026 |url=https://www.worldweatherattribution.org/climate-change-and-urban-pressures-intensify-flood-risk-on-the-gulf-of-guinea-coast/ |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{worldweatherattribution2026climate, author = {{World Weather Attribution}}, title = {{Climate change and urban pressures intensify flood risk on the Gulf of Guinea coast}}, institution = {World Weather Attribution}, year = {2026}, month = jul, url = {https://www.worldweatherattribution.org/climate-change-and-urban-pressures-intensify-flood-risk-on-the-gulf-of-guinea-coast/}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }