The government's air quality health index for the city was at "very high risk", suggesting people reduce or reschedule any strenuous outdoor activities. Children, seniors and those with cardiovascular or lung diseases such as asthma are at higher risk. "Keep it running to help filter the air and keep your family cool".
"Smoke from several large wildfires in Canada was so thick and widespread that it was easily visible from 1.5 million kilometers away from Earth", NASA wrote in an accompanying news release.
If you open the windows you may let in more polluted air. "The heaviest blob of smoke is probably going to stay in the central part of the province where the fires are", he said.
In the image below, you can see the extent of the smoke across Alberta and the southern Prairies, stretching all the way through the U.S. Midwest, Great Lakes region, and on to New England. In a special statement, Environment Canada says it's due to smoke from wildfires in northern Alberta.
A combination of high level winds in the atmosphere (jet stream) orientated across Ontario and Quebec, then over the Maritimes, and a passing cold front have created a path for some of the smoke to reach us.
A helicopter drops a bucket of water on the Chuckegg Creek wildfire west of High Level, Alta., in a Saturday, May 25, 2019, handout photo.
In the short term, she said the most common symptoms would be irritation to the eyes or throat. Those bigger particles are much better at scattering the longer wavelengths of yellow and orange, giving the smoky sky its distinctive apocalpytic tint.
However, Gustafson said it's hard to measure the long-term effects of consistent exposure over time.
Smoke continues to be an issue for Canadian residents today, March 31.
"My colleagues and I attribute that to human-caused climate change". "The wind conditions and the extreme dryness have pushed some of it closer to town".
"We're seeing more fire because our climate is changing, in particular, because it is getting warmer".