Why This Matters
For most Americans, the Canadian wildfire smoke that blanketed the Midwest and Northeast from July 14 through July 20, 2026, was an inconvenience. Schools kept children indoors. The Chicago lakefront was deserted. Detroit and Minneapolis recorded their highest air quality index readings in 27 years. The Washington, D.C. area recorded PM2.5 concentrations near 200 micrograms per cubic meter, triggering Code Purple alerts. More than 120 million Americans were advised to limit outdoor activity.
