The Somme department was hit by severe flooding that began in February 2001, peaked in March and April, affected at least 138 municipalities, and required the prolonged evacuation of residents from hundreds of homes. Everyone remembers the images of that tragedy. But the distress of the victims and their families is too often ignored or forgotten too quickly. And when the waters finally recede, after endless months, we too often tend to believe that the disaster is over, whereas for many, its consequences are only just beginning. This is why it is so important that this study, aimed at measuring the impact on health, be conducted among the flood victims of the Somme. It is the result of a collaborative effort between the Nord-Pas-de-Calais-Picardie Interregional Epidemiology Unit, ORS Picardie, and the Amiens University Hospital, with the active support of the Somme Departmental Directorate for Social Affairs (DDASS) and the Somme General Council. This study underscores the need for such coordinated efforts among public health stakeholders at the regional level to assess health consequences and ensure appropriate support and care. Above all, it highlights the importance of medical and psychological follow-up for the victims of these floods, and the need to provide very long-term follow-up, as the health consequences—particularly psychological ones—can be long-lasting and severe: stress, depression, and increased tobacco and alcohol consumption are some of the most striking factors that exacerbate the vulnerability of displaced populations and their health. May this work also contribute to better managing the health consequences of these unfortunately recurring phenomena. Indeed, in 2002 the Gard region was, in turn, severely affected, and then, in 2003, a large part of the towns and villages in the Rhône Valley. Each time, after the organization of first aid and the active, effective interventions of civil protection, the waters finally recede, leaving behind lasting devastation that we have a duty to address and, above all, to better prevent. While land-use planning adapted to these risks undoubtedly remains the priority strategy for prevention, the fact remains that these natural disasters will likely always be the cause of population displacements and will generate situations of stress, anxiety, and depression that we must recognize, support, and treat. The exemplary work carried out in this study should help us in the future to make our interventions more effective. One protective factor deserves to be highlighted: human solidarity. The social fabric made up of family and friends has, in most cases, managed to withstand the rising waters and their devastating consequences. There is a great lesson in humanity to be learned here, and one that must be supported, since epidemiology confirms that the strongest barriers are those of the heart. Appendices: http://www.chu-amiens.fr/docu/ESIS2001annexes.PDF