5 trends tracked about this subject — the full history, oldest to newest below.
Wildfire smoke from Canada creates air quality concerns in New Jersey and the Northeast during the final weekend of the World Cup.
Wildfire smoke and poor air quality have forced the postponement of a highly anticipated MLS match between Chicago Fire and Vancouver Whitecaps.
Canadian wildfire smoke blankets the US, prompting health warnings and urgent questions about air quality protection.
As Canadian wildfire smoke blankets the US, major outlets report on health risks, vulnerable populations, and mask protection.
Dramatic footage shows a freight train and its crew surrounded by massive wildfires as blazes tear through northwestern Ontario.