Overview

• This short-lived heatwave marks Germany’s first of 2025, with the DWD forecasting peak highs of 34–35°C in regions such as Baden-Württemberg.
• Days exceeding 35°C are now termed “Wüstentage,” a label introduced to reflect the growing frequency of extreme heat in Central Europe.
• The DWD’s UV index is expected to reach levels 8–9, triggering health advisories for older adults, children and individuals with pre-existing conditions.
• Thunderstorms with heavy rain, hail and gusty winds are forecast to sweep across Germany by Sunday, raising the risk of flash flooding in some areas.
• Experts say this surge and its rapid end illustrate broader climate trends and could foreshadow the formation of a summer heat dome over Europe.