Unusually low temperatures in Finland, Sweden, and Norway have caused travel disruptions, with snow hampering train movement and ferry services suspended.

Temperatures in Finland and Sweden dropped below -40 degrees Celsius, marking the coldest temperatures of the winter.

In Swedish Lapland, temperatures reached -43.6 degrees Celsius, the lowest January temperature in 25 years.

The cold snap, contrasting with Europe's warmer-than-usual autumn, has led to travel issues, including a closed major highway in Norway and disrupted train traffic in Sweden's Arctic North.

The cold weather persists amid concerns about global warming and climate change.