Another hot week is in store for the region, but the heat will finally lose its intensity as the weekend approaches.
Eventually that area of high pressure will weaken, allowing the jet stream to drift southward.
The oppressive weather has enveloped much of Central and Eastern Canada since the Canada Day long weekend.
However, daytime highs are still expected in the low thirties in the next two days.
Dr. Mylene Drouin, head of public health for the Montreal region, said the number of fatalities has risen since authorities first announced six deaths on Tuesday, but that the spike is not unexpected.
A cool down is expected by Friday with the passage of a cold front.
An extended heat warning issued by the city's medical officer of health on Sunday remains in effect.
The Montreal city government unveiled an "extreme heat" plan Tuesday that includes distributing water to groups working with the homeless.
So far the heat has only broken one record in Toronto - on Friday, Pearson airport hit a high of 35.4 degrees.
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"What's more unique about this is the duration", said Kelly Hobelman, a meteorologist with Environment Canada.
He said the Montreal heat exposure victims were between 50 and 80.
"We go out to the paramedics, we go out to the hospitals and we ask them to make sure to identify any deaths they believe are related to heat and that allows us to intervene more quickly", Kaiser said.
He says the new system is more accurate.
Isolated adults, seniors, young children, people experiencing homelessness and people with certain mental health illnesses, chronic illnesses, heart and lung issues or limited mobility are at greater risk of heat-related illnesses.
Phillips said that humidex values, some approaching the mid 40s, have made the heat particularly hard to take for many, especially these last few days.
Never leave people or pets inside a parked vehicle.