Workers are still trying to clear waterways in the town of Brienz in the Bernese Oberland which was hit by a massive storm last week.
Efforts are being hampered by continued heavy rain.
Last Monday, about 70 people were forced to leave their homes as water rushed though the town on its way to the Lake Brienz.
While many have been able to return, there are still some houses which are in danger of collapsing.
The flood water has left rubble piles as high as 5 metres.