Humidex values will reach between 35 and 38 today.
A warm and humid air mass will remain in place through this evening.
A return to temperatures near seasonal values will occur overnight tonight.
The risks are greater for young children, pregnant women, older adults, people with chronic illnesses and people working or exercising outdoors.
Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to QCstorm@canada.ca or tweet reports using #QCStorm.