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Chicago and Detroit have the worst air quality in the world due to Canadian wildfires. Here's how to stay safe.
By Thao Nguyen and Jeanine Santucci
Top news
Michigan air quality impacted by smoke and fires this week
Heatwave causes Texas deaths, tests power grid and swelters the South
By Erica Werner, Kate Selig and Dan Stillman
Prepare for More Smoky Summers in the Midwest and Northeast
By Aydali Campa
Canada wildfires spark air quality alerts in Chicago and Milwaukee
By Mike Wendling
All coverage
Unhealthy Air Lingers in New York, Chicago
By Brian K. Sullivan
Canadian wildfire smoke affects Detroit, Chicago, other parts of the US
By Mike Householder and Corey Williams
Chicago's air quality currently worst in world
By Ed Curran, Albert Ramon and Sara Machi
Wisconsin air quality alert: What to do when air quality is bad
By Laura Schulte and Ridah Syed
Hazy skies strike again: Iowa sees air quality advisory as Canadian wildfire smoke returns
By Victoria Reyna-rodriguez
Detroit air quality alert extended through Thursday with more wildfire smoke expected
By Frank Witsil
Air quality alert for St. Louis from Canadian wildfire smoke
By Angela Hutti and Chris Higgins
Air quality alert today: Canadian wildfires prompt warnings in NJ
By Kaitlyn Mccormick
Chicago's air quality worst in the world, global index shows
By Nell Salzman, Vivian La and Laura RodrÃguez Presa
Wildfire smoke live updates: Detroit, Chicago and the Midwest blanketed by haze from Canada
By Rachel Treisman
Air Quality Plunges Due To Wildfire Smoke | Weather.com
By Jonathan Erdman, Chris Dolce and Sean Breslin
Air quality index live updates: Wildfire smoke still brings 'unhealthy' air to many US cities
By J. Trevor Hughes
Chicago air quality at unhealthy levels due to Canadian wildfires smoke; Alerts in effect in Illinois, Indiana, Wisconsin
By Liz Nagy and Karen Jordan
Wildfire smoke updates: CDC issues health alert on wildfire smoke exposure
By Meredith Deliso, Max Golembo and Morgan Winsor
Chicago Has The Worst Air Quality In The World Right Now. Here's How To Protect Yourself
By Quinn Myers
Smoke from Canadian wildfires prompt air quality alerts in Chicago, Detroit
By Melina Walling, Melissa Winder and Trisha Ahmed
More than a third of the US population, from the Midwest to the East Coast, under air quality alerts from Canadian wildfire smoke
By Nouran Salahieh, Lauren Mascarenhas and Joe Sutton
Wildfire smoke map: Which US cities are forecast to be impacted by fires burning in Canada
By Julia Jacobo
Air quality Code Red in PA, DE; Code Orange in NJ
By Joe Brandt, Kate Bilo and Nikki Dementri
Canadian wildfire smoke: Poor air quality, haze hits East Coast
By Amanda Coletta, Dan Stillman and Kate Selig
Why it is hazy in Wisconsin and what to know about air quality alerts
By Beck Andrew Salgado
US air quality map shows cities plagued by Canadian wildfire smoke
By Jeanine Santucci
Air quality updates: 3 cities among worst; when will it recede?
By Doyle Rice, J. Trevor Hughes and Jeanine Santucci
Air quality in Michigan: What you need to know
By Aurora Sousanis
Report: Detroit has world's worst air quality amid drifting Canadian wildfire smoke
By Jakkar Aimery and Mark Hicks