“Smoke concentrations will be such that they could impact public health at times, according to an advisory issued by the state Division of Air Quality.

An additional 12,000 people in northwest Alberta have been placed on evacuation alert as an out-of-control wildfire in the area grows.

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.

Locals blamed a mining company for attempting to hide what they called an 'ecological tragedy.'

Blame for pollution is focused on failure of coal plant to filter emissions.

The death toll in the Camp fire in Northern California rose to 63 Thursday as President Trump planned to visit California to meet with people impacted by the wildfires in what marks his second trip to the state since his election.

Two deadly wildfires fueled by "devil winds" tore through opposite ends of California on Sunday, with residents urged to heed evacuation orders by officials forced to leave their own homes. In northern California, the Camp Fire is one of the deadliest and most destructive in the state'

For 300 years, glacial runoff was the major water source for Kluane Lake, flowing in by way of the Slims River. But in May 2016, Kluane Lake levels dropped precipitously. The problem was a case of "river piracy" — incredibly rare, and hugely significant. The terminus or end of the Kaskawulsh glacier had receded enough that a glacial lake that fed the Slims River suddenly drained when the glacier outflow found a new direction to a new river.

Set against the austere peaks of the Western Brooks Range, the lake, looked like it was boiling. Its waters hissed, bubbled and popped as a powerful greenhouse gas escaped from the lake bed.

Southern California went 87 days without a clean air day, the longest stretch of consecutive ozone pollution violations in at least 20 years. Regulators blame the persistence in pollution on hot, stagnant weather and are studying whether climate change is driving it.

The British Columbia government has declared a state of emergency to support the provincewide response to the ongoing wildfire situation.

Exhaust emissions from a Norwegian Cruise Line vessel docking in Juneau prompted at least 10 complaints to an Alaska regulatory agency.

A haze surrounding the hills had a distinct smell of burned wood.

Windows have been open during the record heat and the interior of the house is also full of pollen, a thin layer can be seen on the floor near windows. Everyone, even people like myself who rarely experience allergies, are feeling the effects, burning eyes, runny nose, and cough.

Spiking levels of birch pollen around much of the state are also being seen during an early spring in Anchorage this week, as doctors deal with an influx of allergy and asthma patients.