Heavy smoke continues to blanket much of the Greater Toronto Area (GTA) under an orange air quality warning, with Environment Canada advising residents to limit outdoor activities.The smoke, originating from wildfires in northwestern Ontario, has led to PM2.5 levels as high as 121 μg/m³ in areas like Oakville and Brampton.While rain showers of up to 20 mm are forecast for Saturday morning and early afternoon, the smoke may return later in the day.

Meteorologist Rob Kuhn noted that thunderstorms could temporarily clear the air but warned of potential health risks, including headaches, eye irritation, and respiratory issues.Vulnerable groups such as seniors, children, and those with preexisting conditions are urged to avoid outdoor exposure.The Toronto Caribbean Carnival Junior Carnival Parade was postponed to Sunday due to weather concerns.

Additionally, wading pools and outdoor beaches in Toronto remain closed during the warning period, while six city buildings operate as 'cleaner air spaces.' Environment Canada emphasized that while some improvement is expected midday, the situation remains critical.