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This is what the winter of the century looked like in Poland. In some areas, buses traveled in "tunnels" dug in the snow. This winter of 1978/79 was exceptionally snowy. From the night hours of December 29 to 30, a frosty air mass began to flow in from the north, which caused the rainfall that occurred at that time to gradually change into sleet and snow and to intensify. They were accompanied by strong winds, causing snowdrifts to quickly form. Record-high snow cover was recorded in: Suwałki (84 cm, February 16), Łódź (78 cm, February 2), Warsaw (70 cm, January 31), Chojnice (60 cm, February 19), Szczecin (53 cm, February 19), Koło (46 cm, February 26), Kielce (39 cm, February 2) and Poznań (29 cm, February 20). Since January 1, 1979, the entire country was already paralyzed by snowdrifts and frost of several degrees. On January 1, the Gdańsk governor declared a state of natural disaster in the province. In the following days, due to disruptions in transport, there was a shortage of energy resources. Frozen railway switches and cracked rails due to frost meant that coal shipments to the heat and power plant reached the plant exceptionally rarely, and defrosting those that were delivered was very difficult. The army equipped with heavy equipment was sent to clear snow from the tracks and roads (including tanks whose caterpillar tracks tore off a thick layer of frozen and compacted snow from the roads). In most cities, public transport did not function or operated to a very limited extent. Intercity transport also functioned very poorly. In some areas, buses traveled in "tunnels" dug in the snow. The then Minister of Education and Upbringing, Jerzy Kuberski, decided to suspend the return of children and young people from winter camps. Heavy frost and frozen ground were also indirect causes of the gas explosion in the PKO Rotunda in Warsaw on February 15, 1979.