The Canadian province of British Columbia suffered nearly double the average deaths as temperatures hit a record high of 46.6°C during the past four days of "extreme heat".
At least 233 people died in the West coast province between Friday and Monday, about 100 more than the average for a four-day period, and the number was expected to rise as more reports were filed, officials said.
Environmental heat exposure can lead to severe or fatal results, particularly in older people, infants and young children and those with chronic illnesses, Chief Coroner Lisa Lapointe said in a statement.
British Columbia closed schools and universities on Monday due as temperatures soared.
Lytton, a town in central British Columbia roughly 200km (north of Vancouver, reported a temperature of 46.6°C on Sunday.
Canada is widely known for its brutal winter and snows, and prior to the weekend the historical high in Canada was 45°C, set in Saskatchewan in 1937, according to Environment and Climate Change Canada.
The heatwave in the Pacific Northwest, which is more accustomed to long bouts of rain than sun, resulted from a high-pressure system that wasn't moving, said Greg Flato, a senior research scientist with Environment and Climate Change Canada, based in Victoria.


Family of alleged Bondi gunman unaware of 'radical mindset', say Indian police
Israeli forces kill Palestinian teen in West Bank, health ministry says
Trump sues BBC for defamation, seeks up to $10 billion in damages
FBI foils 'terror plot' targeting Los Angeles
Hong Kong court finds tycoon Jimmy Lai guilty in landmark security trial
Ukraine peace talks stretch into second day at start of pivotal week for Europe
Flash floods kill at least 37 people in Morocco's Safi province
'Hero' who disarmed Bondi gunman recovering after surgery, family says
