In Belgrade, the Danube river has frozen in several portions, crippling shipping on Europe's busiest waterway.
At least 250 people have died due to cold in Europe even as more record low temperatures and snow are in the forecast.
Serbia has declared a state of emergency after the snow snapped access to tens of thousands of people.
East Europe continues to be the worst hit with over 300 people dead so far, including 122 from Ukraine itself.
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