Rescue workers airlifted residents from a half-submerged riverside district of the Swiss capital today as large swathes of central and southern Europe remained underwater and the death toll from flooding rose to 42.
Hardest hit was Romania with 31 victims - many of whom drowned as torrents of water rushed into their homes. Austria, Bulgaria, Germany and Switzerland reported a total of 11 dead, but numbers were expected to climb as more bodies of the missing are recovered.
Across the Alps, military helicopters ferried in supplies to valleys cut off by flooding and evacuated stranded tourists and even cows isolated in mountain pastures by the rising waters.
"It really hits home when you see something like this," said fire service chief Franz Bachmann, who led the evacuation operation. "Lots of people have lost their whole existence."
Residents looked on in tears as water receded slowly, offering the first glimpses of streets, squares and ground floors submerged in mud.
All 1,100 residents of the low-lying area have been evacuated, police spokesman Franz Maerki said.
Police kept guard to prevent people from returning, warning that deadly gushes of water could surge down from the mountains as blockages of debris and mud give way.
"As soon as this wood is gone, the water here will rise rapidly again," Bachmann said.
Many homes were in imminent danger of collapse, and electricity, phone service and gas were cut off, city authorities said.
Flash flooding in Romania's hard-hit Harghita county spurred waves as high as four metres, local authorities there said. Three people were missing in Harghita, including a four-year-old girl.
Szillard Stranitsky, who drove through the area last night, said cars were unable to move because of the rain and mud on the roads.
"I was scared of driving over a corpse, either human or animal, because I couldn't see a thing," he said.
Meanwhile, officials in Austria turned their attention to the clean-up and reconstruction as the rains eased.
"The danger is over," said Doris Ita, the head of Austria's flood emergency department. "But we are still watching the situation."
Victims struggled to clear debris and shovel mud from their homes in the Austrian provinces of Tyrol and Vorarlberg, where many areas remained cut off by flooded roads.
In Germany, the Danube flooded part of the south-eastern town of Kelheim, including its Weltenburg Monastery, founded in the seventh century and described as the oldest in Bavaria.
The ground floor of the Benedictine monastery, which draws 500,000 visitors a year, was submerged today, said Father Benedikt, the monastery's prior. "The community is working feverishly to rescue what it can," Fr Benedikt said.
A 28-year-old man became the first victim of the floods in Germany last night, drowning near the south-eastern town of Rosenheim when his rubber dinghy capsized.
Elsewhere in Switzerland, much of the historic old city of Lucerne remained underwater. More than 350 policemen, firefighters and volunteers worked around the clock to remove debris and protect buildings as children played in flooded squares and streets.