Humanitarian medical action generally targets victims of unpredictable disasters. However, it is possible to anticipate disasters and plan a rapid and effective response, when the areas are well known. In this sense, visual knowledge of climatic or human hazards, combined with the identification of important resources and livelihoods through community mapping in areas where MSF carries out community health activities is essential. In the mayo sava, considered a red zone, communities are exposed to hazards due to increasing climate change or man. To anticipate, a mapping of the community, with the main actor representing the areas and indicator resources threatened by climatic, natural or anthropogenic hazards, is a very powerful tool. It is a decision support tool in case of intervention.