Montreal city hall unveiled an "extreme heat" plan on Tuesday that includes distributing water to groups working with the homeless.
An emergency coordination centre has been activated to supervise those measures and Montreal Mayor Valerie Plante has called on Montrealers to show solidarity with at-risk people.
While coastal areas can expect cooler conditions, overnight lows will struggle to fall between 18 or 19 C degrees.
"A cold front is going to come Thursday night, and that will drop our temperatures back to more normal ones, especially for this weekend", says Cheng.
So far the heat has only broken one record in Toronto - on Friday, Pearson airport hit a high of 35.4 degrees.
In Montreal alone, six heat-related deaths occurred over the weekend, most of whom impacting people living alone, according to CNN. "So, at least a bit of a break from this intense heat that we've been experiencing".
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Friday's forecast is for a mix of sun and cloud, a 30 per cent chance of showers and a high of just 27 C and a low of 13 C that will have us all throwing open our windows.
Dr. Melissa Genereux, head of public health in the Eastern Townships, told a news conference Wednesday the victims are all adults - either seniors or people suffering from chronic illness.
Mylene Drouin, the Montreal Regional Director of Public Health, confirmed the deaths were due to heat.
"There are still two days left of particularly hot weather with particularly high humidex levels", Genereux said.
Environment Canada warns this extreme heat event will continue though for most of the week, calling this streak the most significant heat event in the past few years.
Make sure to stay cool and hydrated.