A Season of Change As we approach the end of September 2025, Tunisia stands on the brink of an exceptional weather event that echoes the dramatic autumn floods of previous years. International meteorological centers have sounded the alarm regarding a deep atmospheric depression originating from the Gulf of Genoa, Italy. This “classic” Mediterranean storm is expected to bring torrential rains across several Tunisian provinces, raising urgent questions about infrastructure readiness and public safety.
Technical Details of the Upcoming Depression According to the latest updates from European and American numerical models, the weather shift is set to begin on Monday, September 22, 2025. High-moisture eastern maritime currents will collide with relatively warm Mediterranean waters, fueling the formation of heavy rain clouds along the eastern coast—stretching from Nabeul and Sousse to Sfax and Medenine.
The Genoa Effect: Why It Is Dangerous The turning point in this weather pattern will occur late Monday and continue through Tuesday and Wednesday. The depression coming from the Gulf of Genoa is notorious for its ability to carry massive amounts of humidity. When these cold air masses meet the high sea surface temperatures of September 2025, the result is often “explosive” rainfall.
Most Affected Regions: Tunis and Zaghouan The “Grand Tunis” area—including the provinces of Tunis, Ariana, Manouba, and Ben Arous—along with the Zaghouan province, are at the highest risk. Forecasts suggest significant rainfall accumulations that could lead to:
- Flash Floods: Particularly in neighborhoods with aging or inadequate drainage systems.
- Urban Flooding: Resulting from blocked sewage and rainwater outlets.
- Traffic Paralysis: Disrupting major highways and public transport networks.
Economic and Humanitarian Risks Experts warn that the danger goes beyond just rain. Potential threats include the overflowing of major valleys (Wadis), which poses a direct risk to nearby residents. Power outages and damage to agricultural crops in the lowlands are also highly likely. Data suggests that September 2025 will be characterized by extreme weather volatility, a trend that aligns with the broader impacts of climate change in North Africa.
Historical Context and Preparedness Tunisia has a painful history with autumn storms. From the devastating floods of 2007 to the Nabeul disaster in October 2018, the lesson has always been the same: prevention is key. Authorities and citizens are urged to clear drainage paths, avoid unnecessary travel during peak rainfall, and secure property in low-lying areas.
Conclusion: A Test for Infrastructure While the rain is a blessing for farmers and depleted water reservoirs, it remains a stern test for Tunisia’s urban planning. As we navigate this Genoa depression, community awareness remains the first line of defense. Let us welcome the rain with caution, ensuring that our autumn stays beautiful rather than becoming a season of crisis.