Thousands of tourists are stuck in Finland's Lapland as extreme cold has grounded flights at Kittila airport. All departures on Sunday to cities like London, Bristol, Manchester, Paris, and Amsterdam were canceled due to temperatures not rising above -35C. Finland's Meteorological Agency predicts even colder weather with lows of -39C on Monday. The cold weather causes problems such as frozen equipment and difficulty de-icing planes, says airport operator Finavia. "Moisture in the air is causing slippery frost," Finavia told broadcaster Yle. Lapland is known for cold winters, but the usual average is around -14C, with rare dips to -30C. Kittila airport mainly serves ski resort visitors and those chasing the Northern Lights. Another airport, Rovaniemi, known as the home of Santa Claus, canceled one flight on Sunday. Flights in and out of Kittila were also canceled on the previous two days. The cold has made roads icy and dangerous; a bus full of Ukrainian passengers slid into a ditch, but no serious injuries were reported. This unusual cold comes amid a storm causing winter chaos across northern Europe, affecting the UK, France, and Germany. In England, a man died when a tree fell on his caravan, and over 100,000 homes lost power in France.