Proceedings of IAHS
Proceedings of IAHS
PIAHS
Articles | Volume 389
Articles | Volume 389
https://doi.org/10.5194/piahs-389-55-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/piahs-389-55-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 389
Post-conference publication
 | 
16 Sep 2026
Post-conference publication |  | 16 Sep 2026

Temporal variability of extreme precipitation in Cotonou: stable climate signal and worsening urban flood impacts

Ninette Alceste Tollo, Audace A. V. Dossou-Olory, and Inès Oyédé

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Short summary
Flooding is getting worse in Cotonou despite stable rainfall. Over 40 years of data show that extreme rain events have not increased. Instead, rapid urbanization – more buildings, less green space, overloaded drains – is the main cause. This finding shifts the focus from climate to city planning as the key solution to reduce flood risk.
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