Southern Ontario has the worst air on the planet

Some of the worst air quality on the planet is currently sitting over southern Ontario, with air quality values between 8 and 10+.

The poor air is a result of both wildfire smoke and intense heat.

Air quality values will be similar on Thursday.

People in the area should avoid strenuous activities outdoors. Children and the elderly should also avoid outdoor physical exertion. Reduce or reschedule strenuous activities outdoors, especially if you experience symptoms such as coughing and throat irritation.