Air quality concerns continue to expand from the Upper Midwest through the Great Lakes region and into the Northeast and New England as wildfire smoke from Canada drifts southward into the U.S.

At least three people have been injured and hundreds of homes and businesses are at risk in California as a massive wildfire spreads across the Los Padres National Forest. Follow Newsweek's live blog for updates.

Smoke from Canadian wildfires is causing air quality concerns for millions of Americans in the Midwest and Northeast.