Overview

• Forecasters expect the most intense rainfall overnight into Tuesday and through Tuesday, with 30 to 50 liters per square meter possible in a few hours and locally higher totals.
• North Rhine-Westphalia, Hesse, Rhineland-Palatinate, Saarland and parts of Baden‑Württemberg are in focus, with official warnings issued in places such as Oberhausen and Bottrop.
• Authorities advise securing property and cellars, preparing for flooded streets and major traffic disruptions, and planning for possible power and mobile network outages.
• DWD notes uncertainty over precise timing and hotspots, with a potential emphasis on NRW, and says targeted warnings will be updated as forecasts refine.
• Conditions are forecast to ease by midweek with a calmer window around Thursday, and temperatures sliding from low‑mid 20s Celsius on Monday to roughly 17–22 degrees by Wednesday.