Among the consequences pointed out by the Intergovernmental Panel on Climate Change (IPCC), it is assumed that xeric and thermophilic ecosystems, which are mostly involved in forest fires, could colonize areas currently less or not exposed to forest fire risk. The aim of our study is to assess the spatial distri- bution of xeric and thermophilic botanical taxa in Corsica for the end of the 21st Century, according to the climatic scenario named RCP 6 which is considered as one of the most probable reference scenario. The results of our study show a probable increase of forest fire risk due to the colonization of xeric and ther- mophilic ecosystems in more areas than we can observe today.