Environment Canada says the Greater Toronto and Hamilton Area could be experiencing smoky skies into Canada Day.

Smoke continues to drift south from forest fires in Ontario and Quebec.

Swiss air quality monitors show Toronto and Montreal had the worst air of all major cities in the world Friday morning.

People with lung disease (such as asthma) or heart disease, older adults, children, pregnant people, and people who work outdoors are at higher risk of experiencing health effects caused by wildfire smoke.

If you must spend time outdoors, it is suggested you take some precautions, such as using a well-fitted respirator type mask (such as an N95) that does not allow air to pass through small openings between the mask and face,.

It is also a good reminder to check in on people in your care, or isolated neighbours, who may be more susceptible to smoke.