Residents of the Russian Arctic city of Norilsk spent time in and around Lake Dolgoye on Tuesday, as temperatures in the region soared. The lake is used for water discharge from Norilsk‘s Central Heating and Power Plant No. 1, but was used for swimming on July 27 as the temperature in the city reached 30 degrees Celsius (86 F).

Father missing under snow; more than 200 people continue search and rescue at -23C, snowstorm and bleak light of polar night.

The year is coming to a close with temperatures down to minus 50 °C in parts of northern Siberia.

The spill of the fuel-water mixture occurred on the Ambarnaya River in Norilsk during the clean up from the consequences of the accident at the TPP-3.

Toxic fuel from 21,000 ton leak reaches pristine lake, bypassing floating booms, as rivers of diesel pollution cover-up is exposed.

President Vladimir Putin declared a state of emergency last Wednesday, several days after 21,000 metric tons of diesel leaked from a collapsed fuel tank outside the city of Norilsk.The pollution now risks running north into the Arctic Ocean.

The exact reason of the leak is yet to be established, but a statement from Norilsk Nickel company, which operates the site suggests it could have been caused - worryingly - by collapsing permafrost.

Summer seems like it was just yesterday.

It is the first polar bear seen in the city in more than 40 years, according to local environmentalists.

In the industrial city of Norilsk in Siberia's Krasnoyarsk region, which sits above the Arctic Circle, visibility dropped to zero and buses, planes and ships were canceled or rerouted as a snowstorm raged on Tuesday, reaching speeds of 25 meters per second. The city's emergency services stayed on high alert as a holiday was declared for children and mobile heating stations were set up.

Red water - nickel processing plant says cause is decades of contamination in Soviet times which company is working to overcome.