With temperatures set to stay over 30°C this weekend, many Luxembourgers have planned to spend time at the Upper Sûre Lake's popular beaches.
The high demand, however, means that there are no more slots available to reserve at the lake on Saturday and Sunday. Authorities have advised people without reservations should not attempt to gain access.
For those seeking to go elsewhere, Remerschen's Baggerweier also requires a pre-booked reservation, available online. There are just 1,500 spots available.