The Siberian weather system forecasters have nicknamed the "Beast from the East" has brought the coldest temperatures for years to many parts of the continent.
Will the big chilll continue for long?
It is expected to last for most of the week.
In the south of the country, an 83-year-old woman from Adancata was found collapsed in the snow and died on the way to hospital.
A 65-year-old man was found dead late on Monday in the eastern county of Suceava, according to officials.
Parts of a motorway linking the capital Bucharest to Constanta and dozens of other roads were closed. More than 80 trains and 15 flights were cancelled. Romania's Black Sea ports were closed.
Schools were closed in Bucharest and in ten counties.
Record snowfall of 182 cm paralysed the northern town of Delnice. Rescue services took several hours to evacuate residents in the nearby village of Mrzle Vodice. Temperatures hit a low of -20 degrees Celsius in Zavizan on the Velebit mountain.
The roofs of dozens of houses collapsed under the weight of snow in the Unsko-Sanski canton in northwestern Bosnia.
State-run television reported that the main Golubovci airport was closed for several hours overnight.
Parts of the east saw up to 10cm of snow and the weather service said temperatures could fall towards -10 degrees Celsius in some rural areas.
Some schools closed on Tuesday and train services and some flights were canceled. In London, snow covered some parts of Westminster and the Canary Wharf financial district.
Against the backdrop of a snow-covered Mount Vesuvius, a rare snowstorm in Rome on Monday prompted the Italian authorities to call in the army to help clear the streets.
As the storm moved south on Tuesday, Naples got the most snow it has had since 1956. It blanketed the beaches and covered fishing boats in harbours.
Traffic and train services were paralysed. Schools were closed in Naples and much of southern Italy.