This operation aims to provide assistance to three public inter-municipal cooperation institutions (EPCI-FP) to collectively diagnose their vulnerability to flooding by overflow, uplift and runoff and propose to them a programme of quantified actions to be implemented in the short, medium and long term. This initiative will also be enhanced by the drafting of a methodological guide to encourage other EPCIs to embark on the process. It is a market to support three EPCIs to analyse their vulnerability to floods, to coordinate all public, private and associative actors of a territory on the observation and to help them build consensus solutions adapted to their territory and according to the human and financial resources they can devote to it.