Weather moderates in western Europe
An annual Christmas Day swimming race in London was called off Saturday after the water froze and a midwife had to ski to a mother-to-be on a snowbound Danish island.
But European flights were almost back to normal after hundreds of passengers were trapped at the main Paris and Brussels airports overnight amid freezing chaos.
For the first time since 1981, swimmers arrived at the Serpentine in London's Hyde Park for the 100-yard (91-metre) open-air race to find the lake had frozen over.
It was the result of a cold snap that forecasters predict could make this the coldest December in Britain for more than 100 years.
On England's south coast, members of the Brighton Swimming Club took their annual Christmas dip in the Channel, where the temperature was a refreshing 3.3 degrees Celsius (38 degrees Fahrenheit).
On the Danish island of Bornholm even a tracked military vehicle failed to get through the snow to take a midwife to the village of Tejn so that a colleague had to take to her skis instead.
Rene Wang Hansen told AFP the midwife covered six or seven kilometres (four or five miles) to reach his daughter Gitte, who was later able to board the army's personnel carrier to be taken to hospital for the birth of a boy.
The Baltic island of some 43,000 people has been snowbound since Thursday and police have advised everyone to stay at home. Hundreds of tourists and other visitors have been put up in a gymnasium and a military barracks.
In Germany, another Baltic island, Ruegen, was also snowbound and no trains were running, but rail operator Deutsche Bahn said conditions were improving elsewhere and there were no major problems.
In the northwestern state of North Rhine-Westphalia police warned pedestrians to be on their guard after a woman was killed Friday by a falling branch in the forest of Gelsenkirchen.
Airlines took advantage of fewer Christmas Day flights to clear runways and the backlog of passengers, some of whom had waited for days to leave.
About 200 travellers woke up on Christmas morning at Paris's Charles de Gaulle airport after authorities laid on what entertainment they could on a night which is traditionally an occasion for family get-togethers round a groaning table.
Departure screens showed nearly all flights due to leave on time, as staff folded away the camp beds that had been provided along with food, Christmas toys, a Santa Claus and a Catholic mass for the faithful.
"The children have presents, we have things to eat and drink," said Beatrice Clavel, stranded with her husband Didier and their two children.
"All that's missing is a good shower."
Junior transport minister Thierry Mariani, who visited exhausted travellers at the airport just before midnight, said airports were struggling to deal with the third bout of ice this month.
The problem was compounded by a strike by workers at France's main anti-freeze factory, but conditions improved when supplies arrived from abroad.
However Mariani's boss, Nathalie Kosciusko-Morizet, announced an inquiry into the airport's handling of its glycol stocks and said officials had to learn from experience, particularly with regard to information for passengers.
She also said it was the job of airlines to provide accommodations for stranded travellers, not the airport management.
Virtually no public transport ran in Britain as usual on Christmas Day, not even Eurostars to and from the continent, but trains in France were back to normal, though high-speed services were still delayed by speed restrictions.
© 2010 AFP