Articles | Volume 26, issue 3
https://doi.org/10.5194/nhess-26-1417-2026
https://doi.org/10.5194/nhess-26-1417-2026
Research article
 | 
19 Mar 2026
Research article |  | 19 Mar 2026

Climate and impact attribution of compound flooding induced by tropical cyclone Idai in Mozambique

Doris M. Vertegaal, Bart J. J. M. van den Hurk, Anaïs Couasnon, Natalia Aleksandrova, Tycho Bovenschen, Fernaldi Gradiyanto, Tim W. B. Leijnse, Henrique M. D. Goulart, and Sanne Muis

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Climate and impact attribution of tropical cyclone Idai (v0.3.0) D. Vertegaal et al. https://doi.org/10.5281/zenodo.17153413

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Short summary

This study highlights the need to disentangle climate change effects on flood drivers using storyline attribution. Whether information is presented as change in one or multiple drivers, or as change in hazard or impact, determines the attribution statement. For compound flooding from tropical cyclone Idai, that hit Mozambique in 2019, we attribute 1–19 % of the flood hazard and 8–35 % of the damage to climate change. The attribution framework can be applied to other events worldwide.

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