They have set up a special liaison program with hospitals and emergency rooms to monitor heat-related illnesses and mortality, Kaiser said, which may explain why the number of deaths seems high compared to elsewhere in the nation.
A heat wave in Quebec has killed almost three dozen, some reports said, as high summer temperatures scorched eastern Canada.
"It could save a life", Genereux said.
Montreal's health department reported 18 deaths, seven were reported in the Eastern Townships, six were reported in the Mauricie-Centre-du-Québec region, Montérégie's public health department reported two and one more was reported in Laval.
He said the Montreal heat exposure victims were between 50 and 80.
A government heat warning is in place for the region, but meteorologists are forecasting a drop in temperatures at the end of the week. The temperature of the air in their homes reached 38 degrees.
Eighteen of the dead were reported in Quebec's provincial capital Montreal, according to regional public health director Mylene Drouin.
But Ontario does not track heat related deaths in the same way as Quebec and does not report on potential causes of death without a coroner's investigation. "Obviously when we get there and the person may have passed, they're very rarely already with family".
He cited a case in recent days in which a death in a home for the elderly led authorities to move five other people deemed at risk to a facility equipped with air conditioning.
In the largest city of the province - Montreal doctors ambulance has received over the last few days, more than 1200 calls, which is 30% more than usual.