Wild swimming is now banned in Seine-et-Marne (77). In the face of the heatwave and the rising number of drownings, Prefect Pierre Ory signed on Tuesday, June 23, 2026, a prefectural decree prohibiting bathing in the Seine, the Marne, the Loing, the Yonne, as well as in lakes, ponds, and other undeveloped water bodies in the department.
The measure complements bans already in place and aims to bolster mobilization, in the context of an unusually long red heatwave alert. The prefecture laments a clear rise in wild swimming along rivers and at unauthorized natural sites.
The toll is heavy. Since Friday, June 19, 2026, five people have drowned in the department, including three minors. These tragedies occurred in areas where swimming is prohibited because they are dangerous and not supervised.
The prefecture reiterates that the risks are real and varied. Beyond the immediate danger of drowning, there are infection risks linked to water quality and injuries caused by dives into uncharted depths.
Law enforcement is on the ground to remind people of the rules and to ticket violators. Non-compliance with the order carries a 150‑euro fine, with the potential for an additional 38‑euro penalty under the Transport Code.
During a visit to Livry-sur-Seine, the prefect delivered a blunt safety message. He urged people not to swim in restricted areas, not to overestimate their physical abilities, and never to plunge into the water while under the influence of alcohol.
« The heatwave is tough on everyone. It invites a dip, but it does not justify anyone risking their life », he insisted. To cool off safely, it’s better to turn to the department’s supervised pools and leisure facilities. The details of the decree remain available on the website of the prefecture of Seine-et-Marne.
This page may contain AI-assisted elements, more information here.
