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A Hazardous Weather Outlook is also in effect across the region. The National Weather Service issued the outlook because of smoke blanketing Wisconsin amid Canadian wildfires in Manitoba and Ontario. The smoke is being transported south by wind patterns, leading to air quality alerts and advisories across the state.

Environment Canada has issued a warning for a multi-day heat event for the GTA and all of southern Ontario starting Sunday. The national weather service says people can expect daytime highs ranging between 30 and 34 C with a humidex that will make it feel like 42.

A recent poll found 35 per cent of Ontario residents reported negative effects to their eye health in the past year, resulting from severe weather such as wildfire smoke and heat waves

Environment Canada urges residents to limit their time outdoors. But even when inside, most buildings can only reduce airborne pollutants by half.

With more wildfire smoke returning, that means we're on track for reduced air quality in southern Ontario on Wednesday, but it won't be as poor as what the province experienced last week and weekend.

Wildfire smoke in several parts of the country is forcing summer camp providers whose communities are under air quality warnings to shift activities indoors or make other changes to keep campers safe.

Today isn’t our first brush with Canadian wildfire smoke. But it’s easily one of most noticeable. Today is the first time this year I’ve been able to smell the smoke along the