Milton grew quickly into a Category 5 storm Monday morning and is forecast to make landfall in Florida midweek.

The smoke particles have already reached high into the atmosphere, so they won't cause health problems or unusual odours. The most colourful sunset is expected on Tuesday evening.

The isotope measured in air in Tromsø for now is unknown. The isotope comes from a nuclear reactor, and is used in medial diagnostic.

A fire destroyed a Peter Pan Seafoods facility in Sand Point, Alaska, causing a pervasive smell of burning plastic from fishing gear stored on-site.

Authorities say at least seven people have been killed after a “superfog” of smoke from south Louisiana marsh fires and dense fog caused multiple massive car crashes involving 158 vehicles.

The smoke is from numerous wildfires burning in Canada’s Yukon Territory.

Grieving parents who lost their nine-year-old boy last week say their son died after a severe asthma attack made worse by wildfire smoke engulfing parts of British Columbia.

Smoke from Canadian wildfires will make breathing outdoors difficult today for millions of people across the six largest provinces and into the United States.

Air quality in Calgary remains poor as wildfire smoke blankets the city. The situation is expected to last through the long weekend.

Kotzebue experienced one blizzard after another in March, and now with so much piled up and drifted snow, the community is struggling to dig out.

Kirkenes had a record warm moon and Kongsberg has had more than twice as much accumulation as they usually do in January.

Officials say a wildfire in Southwest Washington that ballooned Sunday, causing regional air quality issues, may have been started by a firework or firearm.

The fires affecting Moscow are concentrated in the Ryazan region, some 250 kilometers to the south. This is not the first time smog has appeared in Moscow in recent months, with local authorities advising residents to wear masks to protect themselves earlier this month.

Suspended particulates' concentration in the capital area was high today due to a sandstorm on the desert sands of South Iceland, the city of Reykjavik warned at noon.

Ash from Russian volcano has moved over open waters of the eastern Pacific, but Volcanic Ash Advisories remain in effect as aircraft need to continue to stay away from the ash.

All farmer Arild Stenhaug is left with is tiny berries that cannot be sold. He believes the cause is climate change. "We have to listen to a farmer who has lost everything," says a researcher.

Parts of Interior and Southcentral Alaska will see poor air quality as a result of wildfires this week, the Alaska Department of Environmental Conservation warned on Tuesday.

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).

Air quality alerts remain in place for several areas in B.C.'s southern Interior on Tuesday as more than 200 wildfires continue to burn through hundreds of square kilometres of the province.

It's been a hot July. In fact, it was the 10th warmest in 120 years.