Flooding at Simme beim Stauwehr in Wimmis (KEYSTONE/Peter Schneider)

Trains running between Brienz and Meieringen, and Zweilütschinen and Lauterbrunnen are expected to be disrupted for the next 10 days. Check the SBB website for the latest interruptions.

The Federal Office for the Environment this morning reduced the warning for Lake Thun and the Aare River, which flows through Bern, to level two from level three. Still people are advised not to walk or park cars close to waterways there.

Lake Thun and Lake Brienz are already filled to the brim, officials say.

People watch the very full river flowing through Leukerbad. Residents in the village in canton Valais have been told to boil water before drinking it because of the mud and stones churned up, but there is no contamination. (KEYSTONE/Jean-Christophe Bott)

Rivers in Leukerbad in canton Valais were also dangerously high on Monday. Residents there are being told to boil water before drinking it because of the mud and stones churned up, but there is no contamination.

Officials say some areas are getting rainfalls seen only once a century.