Satellite video shows wildfire smoke from Canada spreading over US

Satellite video shows wildfire smoke from Canada spreading over US

• By Staff Writer

A satellite video showed wildfire smoke from Canada spreading over midwestern US. Smoke from over 450 wildfires burning in Canada caused "unhealthy" to "very unhealthy" air quality conditions in parts of the Midwestern United States this week, with Chicago ranking number one in worst air quality in the world on Tuesday. Public health officials recommended residents limit their time outside.