Heatwave Watch: Luxembourg is bracing for an “exceptionally hot and prolonged heatwave” with Meteolux warning June records could fall, and a red alert (vigilance rouge) from midday Monday through likely next Friday; authorities urge hydration, slower activity, and extra readiness for National Day. Public Safety & Health: The Ministry of Health has activated a Level 3 heatwave alert, with targeted support for people aged 75+ living alone or with limited autonomy, plus coordination via a joint operations command post. Outdoor Work Rules: The Inspectorate of Labour and Mines reminds employers to provide shade, frequent water access, lighter clothing, and to adapt indoor and outdoor schedules to reduce heat risks. Local Environment & Recreation: As summer crowds return to Upper Sûre Lake (Stauséi), officials push visitors to use designated car parks and shuttles, avoid illegal parking, use set barbecue areas, and take waste home. Water Quality: Luxembourg ranks 5th in Europe for cleanest bathing waters, with 94.1% of sites rated “excellent” in the latest EEA assessment. Sustainable Building: A Luxembourg straw-bale house project is training jobseekers in low-impact construction methods, showing how insulation can be both affordable and greener.