Overview
- Regional authorities in northern Italy and southern Switzerland activated the highest alert level for extreme rain, with media and forecasters warning of acute danger to life.
- Model guidance projects 300 to 500 liters per square meter through the coming days in Ticino, Piedmont and adjacent valleys, raising the risk of flash floods and landslides.
- The German Weather Service issued warnings for heavy rain and thunderstorms across several states, with local 20 to 50 l/m² in hours and gusts up to about 70 km/h.
- Overnight storms in Hesse triggered emergency responses for flooded basements, displaced manhole covers, fallen branches and temporary power interruptions.
- While private forecasters tout a brief early-September warm spell, the DWD flags short-term uncertainty and expects further unsettled conditions as very warm Mediterranean waters feed the system.