Seven individuals and a dog were rescued along the Côte d'Opale after being cut off by the tide, according to a statement from the Maritime Prefecture of the Channel and the North Sea. These rescue operations took place as the Manche-North Sea coastline experienced spring tides, which are higher than normal and can trap people on the shore. On Sunday, rescuers helped four people and a dog who had been isolated by the rising tide. Three of them and the dog were recovered and taken to the beach of Berck, while the fourth person managed to reach safety on their own. At the same time, two people were stranded by the tide at the beach of Saint-Cécile, on the Côte d'Opale. Two others tried to rescue them but were also caught in the situation. All were eventually recovered by firefighters. The maritime prefecture warned that tide coefficients could reach as high as 101 on Monday and Tuesday. This number indicates the strength of the tides, with higher coefficients meaning more extreme high and low tides. In its statement, the prefecture urged coastal visitors to be extremely cautious. People who find themselves isolated by the tide are advised not to try to swim back to land but instead to stay put and signal their location for help. It also recommends that people should not attempt to rescue others in difficulty, as this can put more lives at risk. The prefecture advises coastal users to check tide schedules and to walk on the beach during low tide. "Return to the shore during low tide," it reminded. High-risk areas that should be avoided include the Bay of Authie, located behind Berck-sur-Mer, the Bay of Canche near the point of the Touquet, the Bay of Somme, and the point of the Hourdel. Other dangerous spots include the beaches of Merlimont, Stella Plage, Le Touquet, Wissant, and the Cap Blanc Nez. The beach of Portel, near the fort of the Heurt, as well as Etretat, specifically the hole at the Homme and the foot of the cliffs, are also considered high-risk areas. These locations are particularly vulnerable during spring tides, when the water level can rise quickly and unexpectedly.