CIST2016, 3e colloque international du Collège international des sciences du territoire, Grenoble, FRANCE, 17-/03/2016 - 18/03/2016The territorial question constitutes the core of sanitary reforms. In France, if we concentrate on the heat-wave risk, we notice a multitude of actors in interrelation. Indeed, this risk on health is complex to comprehend and to represent in particular since it raises and will raise essential sanitary questions, and also because of the ageing of the population. This article highlights the different actors and active plans and the various possible territorial scales to determine and better communicate on sanitary risks caused by heat waves. This has been done through an index of "hazardousness", developed on the ...