Poor air quality may return by Sunday morning due to the wildfires, Environment Canada said.

Wildfire smoke from Ontario has severely degraded air quality across the northeastern United States. Chicago recorded "Very Unhealthy" levels of fine particulate pollution on…

ALBAWABA- Smoke from hundreds of wildfires burning across Canada blanketed large parts of the country on Wednesday, pushing Toronto to the top of the gl

Toronto’s air quality ranked the worst among major cities globally on Wednesday as wildfire smoke from northwestern Ontario blackened skies and spread into the northeastern US,…

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Outdoor workers are donning masks, taking breaks or staying home altogether as wildfire smoke wafts across southern Ontario and health officials raise concerns.

From mask effectiveness to long-term health risks, Star science reporter Kevin Jiang is taking your wildfire smoke questions live in the comments on Friday at 11 a.m.

Wildfire smoke will continue to blanket Toronto on Friday, keeping air quality at high-risk levels before rain expected Saturday could help clear the air.

The sky over Toronto on Wednesday was shrouded in a thick blanket of smoke as Canada's devastating wildfire season continued, with the city recording the worst air quality among…

People who have been wheezing and sneezing at the sight and smell of northern Ontario wildfire smoke this week could be in for some relief.

Forecasters have predicted that the heat and smoke will subside in some areas starting on Friday—but the air quality could worsen yet again this weekend in others.

Toronto’s air quality improved to moderate and low risk Friday, with Saturday rain expected to alleviate it further.

Rain could alleviate conditions in mid-Atlantic and north-east, with World Cup final expected to go ahead on Sunday

Poor air quality may return by Sunday morning due to the wildfires, Environment Canada said.

Environment Canada ended all air quality warnings for Toronto on Sunday, after several days of hazy skies due to smoke from forest fires in northern Ontario.