"Worldwide, we estimate that 82,100 people died prematurely attributable to chronic smoke exposure from the 2023 Canadian wildfires. Of these deaths, 41,900 (95% CI, 28,400–55,400) occurred in North America, including 33,000 in the USA and 8,300 in Canada."

Long-range PM2.5 pollution and health impacts from the 2023 Canadian wildfires - Nature
A modelling study based on satellite observations, machine learning and a chemical transport model quantifies the global and regional exposure to particulate-matter pollution and the human h...