A dynamic assessment tool for exploring and communicating vulnerability to floods and climate change

► Climate change vulnerability assessment for adaptation is an open methodological issue. ► Simplified models coherent with policy frameworks can facilitate communication. ► They can also contribute to overcome policy makers' reluctance to uptake model results. ► A dynamic assessment tool is proposed to facilitate exploration of future scenarios. ► Non-additive techniques are proposed to formalise subjective weighting and aggregation.