A thick, smokey haze continues to affect the Greater Toronto Area (GTA) as Environment Canada maintains an orange-level air quality warning.The air quality health index is at 10+ or 'very high risk' across the region, including Mississauga, downtown Toronto, and Oshawa.Smoke from forest fires in northwestern Ontario is the primary cause, leading to reduced visibility and health risks for all residents.Environment Canada advises limiting outdoor activity, wearing N95 masks, and avoiding prolonged exposure to fine particles.Toronto ranked third globally in pollution levels on Thursday, with some areas briefly reaching the top spot.The warning, first issued on Tuesday, is expected to ease by Friday or weekend as wind patterns shift.

Vulnerable populations, including seniors, young children, and those with pre-existing conditions, are urged to stay indoors and seek medical attention if symptoms like headaches, eye irritation, or respiratory issues occur.City services such as outdoor pools and CampTO programs have been canceled, while six 'cleaner air spaces' are open for public use.The situation highlights ongoing concerns about wildfire impacts on urban air quality and public health.