‘We are at the end of the exhaust pipe:’ Toronto air quality still among worst in world but relief is on horizon CTV NewsWildfire smoke will drive poor air quality through Saturday as new plumes arrive from Canada CNNWildfire smoke prompts health warnings across southern Ontario CTV NewsHow bad are the Canadian & US wildfires, and what my air quality risk? BBCThese are all the smoke-related closures and cancellations in Toronto CP24
