Tramblay Yves auteur aut IRD Villarini G. auteur aut IRD Zhang W. auteur aut IRD text journalArticle eng text/pdf reformatted digital access Floods represent a major natural hazard in Africa, causing over 27 000 fatalities during the period 1950-2019. Despite its relevance, little is known about changes in flood hazard across this continent due to the lack of long-term high-quality streamflow records. Here we use a newly assembled discharge dataset of African rivers, and provide a long-term comprehensive view of flood hazard across this continent. We show that the annual maximum peak discharge does not exhibit a monotonic pattern, but overall decreasing trends prior to 1980 and increasing trends afterwards, especially in western and southern Africa. Our results indicate that these differing trends can be ascribed to changes in extreme precipitation around 1980. Moreover, these changes in intense precipitation pre/post 1980 are due to increased thunderstorm activity associated with enhanced convective available potential energy and zonal vertical shear driven by cooling temperature trends over western Africa. The changes in flood hazard in southern Africa can be tied to changes in Namibia low-level jet. Therefore, the observed increase in flooding since 1980 suggests that it would be beneficial to improve the monitoring, modeling and communication of flood hazard to reduce the socio-economic impacts of these events. specialized Floods Africa trends extreme precipitation AFRIQUE 062 15 10 1040b5 [9 p.] 2020 1748-9326 https://www.documentation.ird.fr/hor/fdi:010079803 10.1088/1748-9326/abb90b 1748-9326 [F B010079803] https://www.documentation.ird.fr/hor/fdi:010079803 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers20-10/010079803.pdf IRD - Base Horizon / Pleins textes 2020-11-12 2025-02-24 fdi:010079803 fre