The precipitation which falls on the south of the country risks overflowing certain rivers in Wallonia. The Vesdre, the Amblève, the Lhomme, the Haute Lesse and the Haute Semois were thus placed in the early flood warning phase on Monday afternoon, we learn about the website of the Operational Directorate General of Mobility and Waterways of the SPW.
Accumulated precipitation could reach 30 to 50 liters per square meter by Wednesday and very locally peak at 60 to 80 liters per square meter, according to IRM forecasts, recalls the SPW. If the pre-alert thresholds have not yet been reached, “we are sure they will be” in view of these forecasts, explains Paul Dewil, director-coordinator of the regional crisis center at the SPW. This is why the pre-alert phase has already been initiated “so as not to have to do it at 2:00 am”. The vigilance thresholds for the Vesdre and its tributaries should be reached overnight from Monday to Tuesday and / or Tuesday during the day, according to the SPW. “In view of the significant consolidation and damage to the drainage network in this hydrographic basin, the pre-alert phase has been initiated.” For the Amblève and its tributaries, the SPW forecasts that the pre-alert thresholds will be reached during the night and / or Tuesday. For Lhomme, Haute Lesse and Haute Semois, as well as their tributaries, the pre-alert thresholds should be reached Tuesday during the day. The operational DG for Mobility and Waterways recommends caution.