A heat event will continue today.
Maximum temperatures today are expected to reach between 30 and 32 degrees Celsius with Humidex values near 40.
Temperatures will cool off tonight as a cold front sweeps through the region.
Hot and humid air can also bring deteriorating air quality and cause the Air Quality Health Index to approach the high risk category.
Extreme heat affects everyone.
The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors.
Never leave people or pets inside a parked vehicle.
Outdoor workers should take regularly scheduled breaks in a cool place.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@canada.ca or tweet reports using #ONStorm.