The setting sun dips the sky in orange-red light over Basilica of San Luca Near Bologna, Italy, 02 January 2014. (Photo by Giorgio Benvenuti/EPA)

Trees are covered with frost near the A6 highway, also known as the “Autoroute du Soleil” (Highway of the Sun), near Dijon, January 6 , 2015. (Photo by Yves Herman/Reuters)

Red clouds are seen over the Groste mountain before the start of the men's World Cup Slalom skiing race in Madonna di Campiglio December 22, 2014. (Photo by Stefano Rellandini/Reuters)

A woman enjoys the view at the sea front in Panama City January 6, 2015. (Photo by Carlos Jasso/Reuters)

The setting sun illuminates the sky behind wind turbines of a wind park near Neusiedl am See, December 22, 2014. (Photo by Heinz-Peter Bader/Reuters)

Residential and commercial buildings are pictured in Vancouver, British Columbia in this June 20, 2011 file photo. (Photo by Jason Lee/Reuters)

Steam from one of the city's heating power plants rises in the cold air as the sun sets at dusk in Bucharest January 7, 2015. (Photo by Radu Sigheti/Reuters)

A woman walks on a wall next to the beach on a sunny day at Narbonne Plage, southern France December 28, 2014. The town, which welcomes thousands of tourists in summer, gets few visitors in winter period. (Photo by Yves Herman/Reuters)

A woman walks with her dog on the beach at the sunset in Valras-Plage, southern France December 29, 2014. (Photo by Yves Herman/Reuters)

A lamp post covered with ice is seen on a pier on the frozen Lake Balaton in Zamardi, west of Budapest, December 31, 2014. (Photo by Bernadett Szabo/Reuters)

The sun sets behind the Washington Monument in Washington, January 4, 2015. (Photo by Jim Bourg/Reuters)

The tower of the Allerheiligen church in Reitham and the mountains of the lake Tegernsee area are silhouetted against the evening sky in Warngau January 5, 2015. (Photo by Michael Dalder/Reuters)

The setting sun illuminates the sky behind wind turbines of a wind park near Neusiedl am See, December 22, 2014. (Photo by Heinz-Peter Bader/Reuters)

An airplane leaves vapour trails in the cold air as birds fly at dusk over Bucharest January 7, 2015. (Photo by Radu Sigheti/Reuters)

Steam from one of the city's heating power plants rises in the cold air as the sun sets at dusk in Bucharest January 7, 2015. The National Weather Administration has issued a warning for extremely cold weather, frost and strong winds until the end of the week, according to local media. (Photo by Radu Sigheti/Reuters)

The Falcon 9 rocket, to be launched by SpaceX on a cargo resupply service mission to the International Space Station, sits on launch pad 40 after a scrubbed launch attempt at Cape Canaveral Air Force Station in Cape Canaveral, Florida January 6, 2015. The SpaceX rocket launch from Florida was canceled because of a last-minute technical glitch on Tuesday, delaying a cargo run to the International Space Station and a pioneering attempt to fly the discarded booster back to Earth, officials said. (Photo by Scott Audette/Reuters)

Sunrise over the Big Horn mountains, December, 2014, in Wyoming. (Photo by Roger Hill/Barcroft Media)

A boy pushes his scooter on a dam facing the Mediterranean sea on a sunny day at Valras-Plage, southern France January 4, 2015. (Photo by Yves Herman/Reuters)

The sky turns pink and orange during a cold sunrise, in December, 2014, in Colorado. (Photo by Roger Hill/Barcroft Media)