Wildfire smoke will linger and spread this weekend. See which cities are most affected.

Wildfire smoke from various blazes has blanketed several major U.S. cities, making Detroit, Chicago, and Washington D.C. among the most polluted globally. This hazardous air quality is expected to persist and spread over the weekend, impacting millions. The situation underscores the urgent need for effective climate action and improved air quality monitoring systems, as residents face health risks from prolonged exposure to dangerous pollutants.