At least four people have been killed in flash floods caused by heavy rain across France, Germany and Austria, according to the news agency AFP.
People were left stranded on rooftops as the flooding cut off roads, with schools forced to close. More heavy rain is on the way, forecasters have warned.
Three people who had been trapped in a house at Simbach am Inn in southern Germany were found dead, according to local authorities, with fears several others could be on the ground floor of the building.
A group of school children had to be rescued in southern Bavaria when a boat trip ran into difficulty in strong currents sparked by a sudden storm, authorities said.
Four people had died and a dozen were injured in the southern Baden-Wuerttemberg region between Sunday and Monday.
It is predicted the waters could rise by another metre over the coming days in Paris, where many promenades along the Seine have already been closed.
On Thursday Prime Minister Manuel Valls is expected to visit Nemours, 50 miles to the south of Paris, where residents had to be evacuated after the Loing river burst its banks.
The national weather service said France had endured the wettest month of May since records began 150 years ago.