Huh?
Since you asked, here’s the first hit I found by Googling “Toronto deaths cold”.
The massive Dec. 22 ice storm that crippled Toronto for days, leaving 300,000 hydro customers without power for varying periods of time, also caused the death of a homeless man. […]
Patricia Anderson of the city’s Shelter, Housing and Support department couldn’t provide statistics of the number of deaths in 2013 and 2014 to date on homeless deaths due to cold weather over the weekend. However, she pointed out there have been 139 reported deaths of shelter residents since 2007 — 59 of which took place last year.
As for CO2, here’s the third link from that same (not complicated) Google search:
Officials are warning residents of storm-hit cities and towns to use caution when trying to keep warm as five people have been reported dead due to carbon monoxide poisoning in Ontario and Quebec.
In Toronto alone Monday night, 11 people were taken to hospital with signs of carbon monoxide poisoning and two people died in the town of Newcastle, east of Toronto, after trying to keep warm with a gas generator in the garage.
Police in Quebec say carbon monoxide poisoning is believed to be the cause of three deaths in a chalet on the province’s North Shore.
But… honestly? You’ve never heard of people dying due to cold? It’s a pretty common occurrence in cities, especially ones that don’t do a good job with their homeless or below-poverty-line populations.