Severe Storms and Flooding Batter Wallonia and Brabant: Overnight Chaos Leaves Homes Inundated

Violent thunderstorms swept across Belgium from Saturday evening through Sunday morning, unleashing torrential rainfall, hailstones larger than ping-pong balls, and widespread flooding that overwhelmed emergency services across Wallonia and Brabant. The Royal Meteorological Institute (KMI/IRM) issued an orange code warning for all Walloon provinces, Brussels, Vlaams-Brabant, and Limburg, later downgraded to yellow and lifted by Sunday morning.

Basse-Sambre: The Hardest-Hit Region

The Basse-Sambre region in Namur province bore the brunt of the storms, with fire services receiving over 1,000 calls in the Namur-Charleroi area. Water levels reached 1.20 metres in some locations within a remarkably short time, according to RTBF. Firefighters rescued people from rooftops in Jemeppe-sur-Sambre, while multiple motorists were extracted from trapped vehicles in Sombreffe. The Battle of Ligny reenactment camp was evacuated as floodwaters rose.

Marc Gilbert, Fire Chief of the Val de Sambre zone and President of the Royal Federation of Belgian Firefighters, described the situation as extraordinary. “The IRM classified us in orange code, but we were more like red code,” he told reporters. “In 52 years of career, I have rarely seen such precipitation.” Peu after midnight, the zone still had more than 300 missions pending.

Hail Damage Across Multiple Provinces

Hailstones measuring the size of ping-pong balls caused extensive damage to greenhouses, roofs, and vehicles across a wide area. VRT NWS reported that in Buggenhout, greenhouses were destroyed and garden furniture shattered. In Londerzeel’s Malderen district, the local community school was severely damaged. Mayor Nadia Sminate (N-VA) said: “All windows are broken, the canopy is destroyed and the bike storage is unusable.”

At the Carl Cox festival in Liezele, approximately 30 people sustained minor injuries from the hail. Police spokesperson Dirk Van de Sande of the Rivierenland zone noted the storm lasted only “10 to 15 minutes… But the hailstones were as big as ping-pong balls.”

Widespread Disruptions

Transportation networks were severely affected. Rail services were suspended between Châtelet and Tamines due to mudslides, and between Tilly and Charleroi after lightning struck a signal installation. Multiple major roads were closed, including the N98 at Keumiée, the Brussels Ring (R0) at Ophain, and the A604 at Grâce-Hollogne. Charleroi Airport briefly suspended flights as the storms passed through.

In Hainaut province, the communal emergency plan was triggered in Aiseau-Presles, while the N90 at Châtelet was flooded, requiring at least one person to be rescued from a vehicle. A house fire in Jurbise was caused by a lightning strike. La Libre Belgique reported that Mont-Saint-Guibert and Court-Saint-Étienne in Walloon Brabant experienced significant flooding, with multiple roads closed.

Insurance Advice for Affected Residents

As residents begin assessing the damage, Assuralia spokesperson Barbara Van Speybroeck has offered guidance. “Storm damage has been part of every fire insurance since the 90s,” she told VRT NWS. Coverage extends to buildings, verandas, terraces, and garden houses, though garden furniture requires an additional “garden” clause. Vehicle damage requires at least basic omnium insurance. Her key advice: “Take as many photos as possible. That’s the most important thing.”

Climate Context and Forward Look

The intensity of the rainfall — described by a 52-year veteran fire chief as nearly unprecedented — is consistent with climate projections showing that warmer air holds more moisture, leading to more intense precipitation events. Residents drew comparisons to the devastating July 2021 floods that killed over 30 people in Belgium. One resident of Jemeppe-sur-Sambre told L’Avenir: “In 2021, we had to redo everything. And now, here we go again!”

Sunday is expected to bring drier conditions with highs of 19-24°C, though the outlook for the week ahead remains unsettled with further rain and storms possible from Tuesday onwards. Questions remain about the total economic cost, whether the national Disaster Fund will be activated, and what lessons will be drawn for emergency preparedness given the significant strain on fire services.