A vast river of wildfire smoke has flowed southward from Canada's burning interior, draping the American East Coast and Great Lakes region in air so thick with particulate matter that Detroit recorded the worst air quality on Earth — twice the EPA's hazardous threshold. What residents experienced as an eerie orange sky was, in the words of one atmospheric chemist, 'the climate change that people breathe' — not an isolated event, but a recurring consequence of a warming world making wildfires larger, more frequent, and more transboundary. Cities from Minneapolis to New York responded with mask
Canadian wildfire smoke blankets US East Coast, prompts health warnings
Widespread respiratory health impacts across millions of residents in affected regions, with vulnerable populations and outdoor workers facing acute breathing difficulties.