Floating ice was seen on the Danube River in front of the Hungarian Parliament building as cold weather hit Budapest, capital of Hungary. /CFP Photo

Hungary and Bulgaria have prohibited shipping on the Danube due to danger from the ice. /CFP Photo

As one of Europe’s main river arteries, the Danube River ships everything including grain, oil, and passengers. /CFP Photo

A cold wave has spread across central Europe during the week, killing dozens of people. /CFP Photo