Arizona Brush Fire Still Spreading But Some Areas Reopen as Air Quality Woes Hit U.S. and Canada

Brushfire threatens homes in northern Scottsdale, prompting evacuations.
One secondary structure was destroyed, but no injuries have been reported.
The cause of the fire is believed to be human-caused but has not been determined.
Smoke from Canadian wildfires is causing haze and air quality concerns in the Great Lakes region and parts of the central and eastern United States.
Over 1,100 people have returned to their homes in northern Scottsdale as firefighters contain a brush fire.