An advocacy group has put a price tag on the heaving roads and leaning buildings ubiquitous to the Northwest Territories.

Tununak Airport near Bethel is facing a catastrophic problem, as airlines are refusing to land there due to the village's shifting permafrost.

Permafrost underneath the structure is believed to have melted since last fall and key parts of the building might not be able to withstand strong winds or an earthquake, according to a professional engineer hired by Dawson City.

New research shows that permafrost soils hold massive quantities of mercury — nearly twice as much as is held in all other soils in the world, plus the mercury in the oceans and the atmosphere —

The world’s permafrost holds vast stores of carbon. What happens when it thaws?

HEALY, ALASKA—Bitter winters still dominate life in the Alaskan interior, but a practiced eye can spot the signs of a warming climate, particularly in the ground. Beneath the rolling fields of tussock scattered just north of the Alaska Range, what was once permanently frozen is starting to thaw. The impacts could ripple across the planet.

Permafrost in some areas of the Canadian Arctic is thawing so fast that it's gulping up the equipment left there to study it.

For years now, buildings in Inuvik have been sinking due to thawing permafrost. It's part of a worrying trend across the Arctic, writes David Michael Lamb.

The Artic landscape is changing at an unprecedented pace: in Sweden, Alaska and elsewhere entire towns and villages, houses half sunken into the ground, risk being moved to more stable ground, as the permafrost they had been built on shifts and melts. In the Canadian north, suitable houses have become so rare that apartment prices have skyrocketed, triggering a housing crisis. All around the Arctic, homes lay abandoned, the damage too severe. Roads and other vital infrastructure are at risk, too.

Climate change has caused a 60-fold increase in active landslides on one Canadian Arctic island.