ReNovRisk-C3 is interested in the meteorological and oceanographic impact of tropical cyclones on the islands of the southwestern Indian Ocean (SOOI) in current and future horizons. It proposes to develop a dynamic of regional and international cooperation based on the establishment of close collaborations between all the regional partners of the project (Mauritius, Madagascar, Seychelles) and the research teams in Réuniones (University of La Réunion, DIROI). The ReNovRisk-C3 project is positioned in a strong societal issue and must meet society’s expectations of science in order to address the issue of predicting and managing natural risks. The proposed developments are in this direction, targeting a better forecast of cyclones and their impacts on the islands of the SO area of the Indian Ocean. The collaborations implemented in this project will help structure the regional scientific community working on tropical cyclones and strengthen interaction among countries facing the same threats as Réunion Island. This project will thus improve the resilience of the territories to the main natural risks, and more particularly to the cyclonic hazard. By proposing to develop regional collaboration on the management of risks associated with cyclones, the ReNovRisk-C3 project therefore contributes to the objectives of the EU H2020 and the strategi