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

Environment Canada says the air quality in Toronto continues to be “very high risk,” with warnings in place from Windsor to Kingston.

Chris Smith, who runs Toronto homebuilding company Woodsmith Construction, says he’s cancelled work on two of his company’s four projects for the day.

Smith himself says he finished his workday Wednesday with burning eyes and a “massive headache.”

However, landscaping labourer Andre Carreira says he and seven co-workers continue to plant boxwoods this afternoon, working in the shade and wearing respirator masks.

Devastating wildfires have raised health concerns and caused event cancellations across southern parts of the province as a smoky orange haze lingers in the sky for another day.

©2026 The Canadian Press