Belgium keeps yellow heat alert in place as temperatures reach 32C before midweek cooldown
Updated June 28, 2026, 12:00 UTC, Brussels: Belgium remains under an IRM heat warning from 00:00 on June 28 until 00:00 on July 1, with the national forecaster saying the current heatwave should ease by Wednesday as maximum temperatures fall below 25C in the centre of the country. The IRM forecast says Sunday remains the hottest point of the period, with highs of 24C at the coast, 30C in the centre and major cities, and up to 32C in Campine and Belgian Lorraine. The SPF Public Health says Belgium's heat and ozone plan is active to limit health impacts, especially for vulnerable people.
Trust & Evidence📚 5 sources· ✓ Editor reviewed· 🧠 AI-checked· Trust status: not yet independently verifiedView evidence & verification Hide
Verification record
- 📚 5 verified sources — Royal Meteorological Institute of Belgium (IRM) - Warnings in Belgium · Royal Meteorological Institute of Belgium (IRM) - Forecast for the coming days · SPF Public Health - Heat and ozone peaks plan · National Crisis Centre - Heatwave …
- 🧠 High confidence — AI-checked, editor-approved
- 🇧🇪 Belgian impact: High
- 📜 Provenance recorded & timestamped
Evidence is generated from the OIS evidence chain and reviewed before appearing on Belgium Pulse.
Powered by OIS / Evidentia
About this story
The subject is a national Belgian heat warning issued by the Royal Meteorological Institute, known in French as the IRM and in Dutch as the KMI. The alert concerns chaleur, or heat, across much of Belgique during the final days of June 2026. It sits alongside Belgium's public-health heat and ozone plan, coordinated through federal, regional and community authorities.
How to read this story
The history
The IRM defines a national climatological heatwave when the maximum temperature at Uccle reaches at least 25.0C for five consecutive days, including at least three days at 30.0C or more. The National Crisis Centre says heatwave risk is very probable in Belgium and is expected to become more frequent and intense as the climate changes.
Regional impact
The IRM forecast points to regional differences: the coast stays cooler at around 24C on Sunday and 20C on Monday, while Campine, Gaume and Belgian Lorraine remain among the warmer areas, reaching up to 32C on Sunday and 28C on Monday.
Local impact
Brussels and the central belt face highs around 30C on Sunday before dropping to 26C on Monday and about 25C on Tuesday, according to the IRM forecast.
What this means for you
Drink water regularly, avoid strenuous activity in the hottest hours, keep homes cool where possible, check on vulnerable neighbours or relatives, and call 112 if someone develops a very high body temperature or severe symptoms.
Related to this story
Live connections from the Belgium Impulse ecosystem — not recommendations.
This briefing was prepared with AI assistance and reviewed by a Belgium Impulse editor before publication. methodology.