LONDON, Dec. 20 (UPI) -- London's Heathrow airport might remain partially paralyzed past Christmas, stranding tens of thousands of passengers, officials said Monday.
The British Aviation Administration said two-thirds of the United Kingdom's largest airport's arrivals and departures would be canceled at least until Wednesday morning, The Guardian of London reported.
The airport has the money to keep open only one of its two runways, the Guardian reported.
Airports in London, Paris and Germany reported canceling dozens of flights as Europe remained in winter's icy and snowy grip, CNN reported.
Frigid temperatures and extreme conditions have plagued Europe since Saturday, with snow, ice and fog throwing travel plans into chaos from Northern Ireland to Bulgaria. Below-normal temperatures were expected to remain in northern Europe for part of the week, CNN reported.
"We were overly optimistic about how quickly we could clear the stands of snow. I regret that," said Colin Matthews, the BAA's chief executive.
British officials said a review of how Britain and its airports have responded to the freeze will be undertaken soon, Sky News reported.
"Once we've got out of the current situation and we have cleared the backlogs at the airports then we do need to ask whether we need to make a step-change in investment priorities," Transport Secretary Philip Hammond said.
Hammond told Parliament members it was a mistake to attempt operating a full schedule Saturday and that the number of flights should have been "severely" cut.
Numerous highways in and out of London were closed because of weather or weather-related crashes, police said. Delays and cancellations on the Eurostar rail services connecting London, Paris and Brussels were reported, The Wall Street Journal said. Eurostar officials said the rail service was operating a contingency timetable.
"We expect ongoing severe weather conditions to result in speed restrictions and delays on our routes," Eurostar said on its Web site. "We will operate a contingency timetable with some cancellations for a number of days."
Hammond loosened some restrictions on Heathrow's night flights Monday, but said more snow was on the way, with up to almost 4 inches expected in London and the southeast part of England by the morning.