A Heat Wave Is Not a Number: The 2026 Event, Global to Local

Tomorrow.io examines a hemispheric heat dome hitting Europe and North America, with Spain reaching 45.1C, France 44.3C, and a new German national high of 41.7C. The piece argues that a single record reading understates the hazard, which comes from duration and overnight temperatures; the U.S. forecast peak approaches 119F felt heat with about 69% of people in major metros facing dangerous conditions by July 4th weekend.