Smoke from Canadian wildfires again plagued portions of the northern United States on July 16, prompting air quality alerts from Illinois to Maine.

Multiple U.S. states and Canadian provinces are experiencing poor air quality from wildfire smoke. Here's where.

Much of the Upper Midwest on Saturday was dealing with swaths of unhealthy air due to drifting smoke from Canadian wildfires.

Canadian wildfire smoke returned to Wisconsin this weekend, with unhealthy levels for people with asthma and heart disease.

The Canadian government’s Wildfire Smoke Fine Particulate Matter map models wildfire smoke for July 15-17, 2025. It shows ...

The Canadian government’s map of wildfire smoke fine particulate matter models wildfire smoke for July 16-18, 2025. It shows ...

A fast-moving wildfire near the Grand Canyon’s North Rim has destroyed the historic Grand Canyon Lodge and dozens of other ...

Canadian wildfire smoke lingers in Michigan. Officials issued an air quality advisory in southeast Michigan for July 15.

Canadian wildfire smoke remains in Michigan. On July 16, officials issued an air quality advisory for western counties.

Much of the Upper Midwest on Saturday was dealing with swaths of unhealthy air because of drifting smoke from Canadian wildfires, covering the northern region of the U.S. at a time when people want to ...

Wildfires continue to burn in Canada, and the smoke is filling communities there and towns across the U.S. border.

Continued drifting of wildfire smoke from Canada and Alaska has prompted Bay Area air regulators to extend an air quality advisory through Monday.