Extreme heatwaves in the Benelux region are increasingly driven by “heat domes,” a meteorological phenomenon where warm air is trapped above the continent. Forecasters at NoodweerBenelux have issued Level 3 warnings for the east of the Benelux, where temperatures are projected to reach or exceed 40°C. This intensity mirrors record-breaking heat events from 2019, when temperatures in Begijnendijk, Belgium, reached 41.8°C, and Gilze-Rijen, Netherlands, hit 40.7°C.
What triggers a heat dome?
A heat dome acts like a lid on the atmosphere, preventing warm air from escaping and allowing it to intensify. According to meteorological analysis, the current event is sustained by an “omegablockade,” a stable pressure pattern that keeps heat trapped above the European continent. While coastal areas benefit from a cooling sea breeze, inland regions, particularly in the east of the Benelux, face the full force of this trapped air.
The 2019 heatwave was a time when new records were placed in the whole Benelux. Belgium’s all-time record of 41.8°C was set in Begijnendijk on July 25, 2019, while Luxembourg recorded 40.8°C in Steinsel on the same day.
How do weather models compare for extreme heat?
Forecasters rely on multiple models to predict the likelihood of hitting the 40°C threshold. The Dutch model, Harmonie, suggests the most intense heat will concentrate in Germany and the far eastern borders of the Benelux. Conversely, the German ICON-D2 model shifts the focus further west, putting the Dutch and Belgian Limburg provinces at higher risk. The French Arome model offers the most aggressive outlook, projecting local spikes of 42°C to 43°C. These discrepancies highlight the difficulty in pinpointing the exact geographic limit of the heat, though all models agree on the severity of the incoming conditions.
Pro Tip: Managing indoor temperatures
To keep your living space tolerable during a heat dome, consider using an air conditioner.
Are record-breaking temperatures becoming the new normal?
The primary health consequence remains prolonged exposure to heat, which is why official guidance emphasizes staying hydrated, finding shade, and monitoring the well-being of animals.
Frequently Asked Questions
- What is a heat dome? It is a mechanism whereby warm air is trapped above the continent.
- Why is the coast cooler than the east? Coastal areas benefit from a sea breeze, which causes the mercury to drop during the day.
- How can I stay safe during a Level 3 heat warning? Stay hydrated, remain in shaded and cool areas, and pay attention to animals.
Stay informed on the latest weather developments.
