The Arctic Circle last weekend recorded the region’s hottest day ever, with Siberian town Verkhoyansk recording 38 degrees Celsius, or 100 degrees Fahrenheit, on Saturday, amid a heat wave that is contributing to severe forest fires.

The average daily temperature in Verkhoyansk in June is recorded at 20 degrees Celsius, which means the Saturday’s temperature was 18 degrees Celsius higher than the month’s average. According to a BBC report, the record-high temperature has not been verified by the experts yet.