A maximum level of caution is in place for swimming this weekend along the beaches of Nouvelle-Aquitaine, as authorities warn of a high risk of "baïnes" forming. Baïnes are natural pools that can look calm on the surface but are dangerous due to strong underwater currents that can pull swimmers out to sea. The alert is classified as "maximum" for Saturday, September 19, and Sunday, September 20, and applies to four departments: Pyrénées-Atlantiques, Landes, Gironde, and Charente-Maritime. Prefect Sophie Brocas, who oversees Gironde, warned that the currents could be especially strong this weekend, emphasizing the need for extreme caution from both residents and visitors. The beaches in the region are expected to be very busy, with temperatures predicted to exceed 25 degrees Celsius. However, many beaches will not have lifeguards or supervision during this third weekend of September, increasing the risk for swimmers. Authorities strongly recommend that people only swim in areas that are officially supervised. Additionally, it is crucial to keep a close watch on children and prevent them from entering the water, as swimming is generally discouraged for the weekend. If individuals still choose to go into the water, they are advised to inform someone close about their plans. This is especially important given the potential danger of baïnes, which have been responsible for several drownings in recent years. The term "baïne" comes from the Gascon language and means "small bath," reflecting the deceptive calm of these natural pools before the sudden pull of the current. In 2023, 14 people were drowned after being caught in baïnes. More recently, in 2025, nearly 1,500 drownings were recorded between June and September, with 400 of those being fatal, according to Santé publique France. These statistics highlight the ongoing risk and the importance of heeding local warnings and safety guidelines to prevent tragedies.