A small town in Siberia reached a temperature of 100.4 degrees Fahrenheit on Saturday, which, if verified, would mark the hottest temperature ever recorded north of the Arctic Circle.

Temperatures have jumped in recent months to levels rarely seen in the Russian region, and it’s a sign of a broader trend of human-caused climate change that’s transforming weather patterns in the Arctic Circle.

The town of Verkhoyansk is one of the coldest towns on Earth — temperatures dropped to nearly 60 degrees below zero there this past November — and the average June high temperature is 68 degrees.

The 100.4 reading in Verkhoyansk, which sits farther north than Fairbanks, Alaska, would be the northernmost 100-degree reading ever observed.

The Washington Post reports that while there are questions about the accuracy of the record temperature, a Saturday weather balloon launch that found unusually high temperatures in the lower […]