Air Quality in Toronto Among World’s Worst as Smoke and Heat Grip City
Toronto is facing dangerous summer conditions as air quality in Toronto ranks among the worst globally on Monday, July 14, 2025. Environment Canada has issued both a heat warning and an air quality advisory for the Greater Toronto Area (GTA), warning residents of the compounded health risks.
Smoke, Heat, and Health Risks Collide
According to Environment Canada, smoke from forest fires in northern Ontario has drifted into the GTA, leading to poor air quality and reduced visibility. The warning notes that health risks are present for everyone, regardless of age or medical history, especially during periods of heavy smoke.
As of 8 a.m., IQAir — a global air quality monitoring service — listed Toronto as the second-most polluted major city in the world.
Those most at risk include:
- Seniors (65+)
- Pregnant individuals
- Infants and young children
- People with chronic conditions or respiratory issues
Heat Warning to Last Until Thursday Night
The extreme heat gripping Toronto is expected to continue through Thursday, with daytime highs between 29°C and 32°C, and humidex values ranging from 35°C to 40°C. Nighttime temperatures will also remain high, staying between 19°C and 23°C, offering little relief.
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Officials urge residents to stay indoors, stay hydrated, and check on vulnerable people, including seniors and those living alone.
Signs of Heat Stroke and What to Do
Environment Canada urges people to recognize symptoms of heat-related illness, including:
- Red, hot skin
- Dizziness or nausea
- Confusion
- Loss of consciousness
In such cases, move the person to a cool place, remove extra clothing, and apply cold water or ice packs while waiting for medical help.
For heat exhaustion, early symptoms include dark urine, headache, thirst, dizziness, and intense fatigue. If these occur, stop any activity, move to a cooler spot, and drink water immediately.
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What You Can Do to Stay Safe
To protect yourself and others:
- Limit outdoor activities
- Keep windows and doors closed
- Use fans and AC when possible
- Dress in lightweight, light-colored clothing
- Drink water regularly, even if you’re not thirsty
- Close blinds to reduce indoor heat
Toronto’s beaches and pools have seen increased visitors as people search for ways to cool down safely while staying outdoors.
How are you staying safe and cool during this heat wave and air quality warning?
More…
- https://www.insauga.com/toronto-2nd-worst-in-the-world-this-catergory
- https://www.cbc.ca/news/canada/toronto/extreme-heat-humidity-gta-monday-environment-canada-1.7584221
- https://globalnews.ca/news/11287367/toronto-heat-wave-poor-air-quality
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