It’s going to feel like 40 C as heat warning continues in southern Ontario

A heat event is expected to continue Thursday in many southern Ontario cities and towns.

Environment and Climate Change Canada has issued a heat warning for:

• Mississauga
• Toronto
• Brampton
• Oakville
• Milton
• Burlington
• Halton Hills
• Hamilton
• Niagara Region
• Durham Region

Maximum daytime temperatures of 30 to 32 C are expected, with humidex values near 40 C. Overnight minimum temperatures will be 20 to 22 C.

A hot and humid airmass is expected to continue through today, as a cooler airmass may arrive by tonight.

Extreme heat can affect everyone’s health.

The health risks are greater for older adults, infants and young children, pregnant people, people with physical and/or mental illnesses, and people with disabilities or mobility issues.

Drink plenty of water regularly, even before you feel thirsty to decrease your risk of dehydration. Thirst is not a good indicator of dehydration.

Never leave people, particularly children, or pets inside a parked vehicle.

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.