Severe permafrost thaw and erosion along Koyukuk River banks.

A Yukon school could soon require constant electricity during the summer merely to avoid sinking. The 'active refrigeration system' would freeze ground under the Ross River school. The device would be the first of its kind in Yukon.

In the course of summer, the whole reindeer population of the Nenets tundra will be made immune against the lethal bacteria infection.

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.

While it researches long-term solutions, Iqaluit is looking at small fixes, like flexible pipe connectors, to stop pipes from breaking and leaking.

Gas pipes supplying Europe run right over swelling Yamal tundra which is deeply unstable to the release of underground methane.

Teller, Alaska is identified by the US Army Corps of Engineers as one of 31 villages in imminent danger of the effects of climate change.

Pipes are built over bulging and unstable Arctic pingos prone to violent eruptions caused by 'thawing methane gas', as seen twice on the Yamal peninsula this year.

Locals say they saw flames and smoke as a major bubble of methane blasted below the surface and created another sinkhole in the Russian Arctic peninsula.

Looking at a map of Arctic Canada, it seems there are literally thousands of lakes and rivers, yet many Arctic communities are facing water shortages or threats of shortages to come. Iqaluit, capital of Nunavut Territory, will be facing that problem in the very near future.

Andrew Medeiros (PhD)

I went to gather some yesterday and there was no water to speak of; in a pond that's has been filled with water my whole life.

A sinkhole has opened up on Ft. Wainwright in Fairbanks. The 3-foot diameter void discovered Monday near a housing unit, is suspected to be the result of thawing permafrost.

Chris Burn at Carleton University is tracking the growing cost of maintaining Yukon’s Dempster Highway as warmer weather brings more landslides, washouts and other challenges.

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.

Scientists rush to site of latest tundra eruption - which formed a crater 50 metres deep - amid fears for homes and key industrial sites.

Thawing permafrost is warping water and sewer lines. Along the coast and rivers, erosion is threatening the lakes that communities use for drinking water or the lagoons where they dump sewage.

About 10 miles of above-ground water and sewer lines froze in mid-January. ANTHC suspects the lines were damaged when melting permafrost caused building foundations to shift.

The unexpected appearance of sinkholes or groundwater flooding is something to which residents have grown accustomed.

The bulges are caused when permafrost beneath the soil melts due to "abnormally warm" weather - allowing methane gas to escape and head to the surface