Winter weather stormed across Russia on Monday, causing temperatures in some areas of Siberia to drop as low as minus 56 degrees Celsius (minus 69 degrees Fahrenheit). Blizzards also caused aircraft disruptions and dumped record amounts of snow on Moscow.

According to the meteorological stations in the Sakha Republic, which is in northeastern Siberia and is home to one of the coldest towns in the world—Yakutsk—temperatures dropped below minus fifty degrees Celsius.

In Oymyakon, an area in Sakha, the temperature was recorded at minus 56 degrees Celsius on Monday evening.

Russian forecasters said it would feel like more than minus 60 degrees Celsius in Oymyakon given the wind and humidity and that temperatures would fall further overnight.

“In the European part of Russia, in the Urals and Siberian territories, the frost is expected to increase in the first week of December,” Russia’s national meteorological service said.

Almost all of Sakha is located in the permafrost zone. In the region’s capital, Yakutsk, which lies some 5,000 km (3,100 miles) east of Moscow, the temperature was around minus 44 C to minus 47 C.

Temperatures of minus 50 C have become less common in recent years because of climate change, with permafrost showing increasing signs of thawing.