Environment Canada lifted heat warnings Friday, despite expectations that temperatures will once again rise early next week.
Kaiser said the social aspect - living alone and not having another place to go to cool down - typically plays a major role in heat-related deaths in the city.
A heat wave in Quebec has killed almost three dozen, some reports said, as high summer temperatures scorched eastern Canada.
Dr. Melissa Genereux, head of public health in the Eastern Townships, told a news conference the victims are all adults - either seniors or people suffering from chronic illness.
Despite a decrease in humidity, the level of danger remains high.
Montreal was the area of the province with the highest number of victims, the government said, with 28 people dying from heat-related complications.
"None of the people we've identified in the last four days had air conditioning at home", Kaiser noted.
The record-breaking heat wave began June 29.
No deaths had been reported for the same period in the neighboring province of Ontario, which has also sizzled under extremely high temperatures.
"If you know people with respiratory problems or people who are elderly, don't hesitate to visit them or give them a phone call to see if they need anything", she said at a committee meeting.
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.
Montreal-area paramedics aren't expecting a big drop-off in calls today despite the more bearable conditions.