Kettle ponds in Denali National Park contain less water this spring than in previous years, due to low snowfall and permafrost thaw. Shrubs are replacing grasses as the lakes dry.

One of B.C.'s most abundant plants is in trouble: patches of hardy salal plants are turning up brown, crispy and dying.

The sun when direct was intense, definitely not April and not May...more like the month of June.

Permafrost preserved the ‘oldest blood in the world’ boosting hopes of bringing extinct species back to life.

In the earliest breakup since the contest began in 1917, the Nenana Ice Classic Tripod fell early this morning.

The Arctic Sounder - Serving the Northwest Arctic and the North Slope

Frigid north winds blow down from the Arctic Ocean, freeze saltwater and push sea ice south. The ice normally prevents waves from forming and locks onto beaches, walling off villages. But not this year.

Warm temperatures are rapidly melting snow and creating ice, which creates difficult conditions for dog mushers. Migratory birds are arriving early, and a mosquito emerged months early. Small owls dead around the Goldstream Valley that looked unusually thin.

The tragedy came after several days of dire warnings about the dangers of river travel due to an unusually early warm-up. Search and rescuers crawled onto weak ice, open water all around, to help retrieve the survivors.

Warmer than normal temperatures in Anchorage may be causing willows (genus Salix) to bud early.

Willows budding about a month early 30 miles above the Arctic Circle.

One of the main winter highways in the Northwest Territories turned into a swamp this week following unseasonably high temperatures.

Avalanche monitors say danger remains high in Turnagain Pass, Girdwood and Portage.

The winter resupply road between Yellowknife and the Northwest Territories' three working diamond mines has succumbed to this week's warm weather.

Deteriorating conditions on the Mackenzie Valley Winter Road have prompted the Northwest Territories government to close the winter highway for the season.

The NWT broke a symbolic temperature barrier as a heatwave continued. There were warnings over ice roads and spoiled meat, and questions about climate change.

Despite daytime closures, evening events expected to happen on schedule this week.

In Yellowknife, the territorial capital, temperatures climbed above zero over the weekend, breaking a record high on Sunday with a temperature of 3 C.

Some mushers worried what the warm weather would mean for the trail ahead.