Cities in Europe, meanwhile, are getting hit with unusually cold temperatures and snowfall. That’s days after the U.S. East Coast had record highs.

“Shocking,” “absolutely astonishing,” and “remarkable.”

That’s how climate scientists are describing the recent unusually warm temperatures in the Arctic.

As the Washington Post reported last week, the region is “stewing in temperatures more than 45 degrees (F) above normal. This latest huge temperature spike in the Arctic is another striking indicator of its rapidly transforming climate.”

The anomaly continued this weekend, as climate researcher at the University of California at Irvine Zack Labe—one of the scientists taking to social media to describe the exceptional temperatures— tweeted Sunday, “The extreme event continues to unfold in the high Arctic today in response to a surge of moisture and ‘warmth.'”

Also on Sunday, Robert Rohde, lead scientist at climate analysis organization Berkeley Earth, tweeted, “The North Pole is warmer than much of Europe right now.”

“In relative terms,” he continued, “that’s a 30 C (54 F) temperature anomaly at the North Pole. This is associated with a warm air intrusion from the Atlantic and displacement of cold air onto Asia following large scale disturbances to the polar jet stream.”