Watch: Canadian wildfire smoke triggers health alerts across the U.S. and Canada

Wildfires in Canada have reached unprecedented levels this season, sending massive smoke plumes across the border into the U.S., prompting health alerts from Ontario to the northeastern states. The smoke has severely impacted air quality, raising concerns about respiratory health and prompting authorities to advise people to limit outdoor activities. This situation underscores the growing threat of wildfires due to climate change, highlighting the need for better cross-border environmental cooperation and public health strategies.