Adapted to a local scale, French crisis management plans need to include a multi-hazard dimension in order to enable the mayors to deal with all the risks identified in their area. Although the municipalities of Grenoble-Alpes Metropole already have set up their municipal protection plans (PCS), the risk associated to the breaking of the levees on the Drac (tributary to the Isère river) is not sufficiently considered yet. If such a risk is not taken into account in the local crisis management strategy, it can quickly overtake the capabilities of the managers, who would have to face and adapt to the emergency. Therefore, without anticipation, the evacuation of numerous citizens in a situation of emergency is difficult to consider. To overcome this point, a methodology was built and presented to support municipalities in the crisis management of levee failures. This research project provided an initial response to the concerned municipalities.