Canadian wildfire smoke plagues northern US, prompts air quality alerts

Fox News senior medical analyst Dr. Marc Siegel discusses the health risks as Canadian wildfire smoke blankets the northern United States, prompting widespread air quality alerts across 15 states.

Canadian wildfire smoke blankets major northern U.S. cities, triggering hazardous air quality alerts across 15 states for over 100 million Americans. Health experts emphasize the severe long-term and short-term risks of fine particulate matter, including worsening asthma, heart conditions and potential cancer risks.