Parts of the Greater Toronto Area (GTA) are under an air quality warning on Monday alongside an ongoing heat warning in the region, Environment Canada says.

Tuesday’s air quality warning has dropped to a 5, considered a moderate risk, down from Monday’s peak of 10+ on the Air Quality Health Index’s 10-point scale.

Environment Canada is warning of poor air quality and extreme heat in Toronto on Monday as southern Ontario braces for a week filled with hot and humid weather.

When Julie Wang sees streets turn into rivers after another heavy downpour in Toronto, she thinks of the 600-square-foot patch of greenery on her roof — and feels a little less helpless.

Toronto and the GTA are under a heat wave and poor air quality warning issued by Environment Canada on July 14, 2025, due to wildfire smoke from northern Ontario. The poor air quality is expected to persist from Monday into Tuesday.

The poor air quality that has blanketed swaths of central and Western Canada is not only infiltrating the lungs, but also distressing the mind.

The City of Toronto is providing free portable air conditioners to low-income, vulnerable seniors as part of a pilot program that started this spring.