Weather officials warned that heavy rainfall was expected for the next four days.
Nearly two dozen people were injured, two of them seriously, when two underground trains collided in the western German city of Duisburg on Tuesday, local police said.
Trains on Germany's intercity lines began running early Friday, a day after being suspended as violent gales battered northern Europe, killing at least six people across the country.
Trains from popular Swiss ski station Zermatt are due to reopen on Wednesday, providing relief for some 13,000 tourists trapped there by heavy snowfall, a statement said.
A rare public apology by top transit executives and an assurance from the government that the cause was clear and the fix not complicated have done little to appease the public.
Two commuter trains crashed head-on in southern Germany, killing at least eight people and injuring more than 100, in one of the country's deadliest rail accidents in years.