Heat wave hits Toronto, much of southern Ontario this week

Torontonians are bracing for what promises to be a scorching hot week in the city.

Torontonians are bracing for what promises to be a scorching hot week in the city. A heat warning, yellow alert, has been issued for Toronto and much of southern Ontario this week as humidex values approach 45. Environment Canada is calling for a high of 33 C on Monday, feeling closer to 38 with the humidity.

On Tuesday, which is expected to be the “peak” of the heat event, the mercury will rise to 37 C, feeling closer to 45. “Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high-risk category,” the weather advisory from Environment Canada read. “Take action to protect yourself and others – extreme heat can affect everyone’s health.

Determine if you or others around you are at greater risk of heat illness. Check on older adults, those living alone and other at-risk people in-person or on the phone multiple times a day." Wednesday will see a daytime high of 33 C with a chance of showers.

The temperature will dip down to 31 C on Thursday and 28 C on Friday. “Watch for the early signs of heat exhaustion in yourself and others. Signs may include headache, nausea, dizziness, thirst, dark urine and intense fatigue.

Stop your activity and drink water,” the national weather agency wrote. “Drink water often and before you feel thirsty to replace fluids.”