- Thick wildfire smoke from Canadian and northern U.S. fires has darkened skies from the Great Lakes to the East Coast, even tinting city skylines orange.
- Officials warn air quality is unhealthy to hazardous — people are being urged to stay indoors, avoid strenuous activity, and wear N95/KN95 masks outdoors.
- The smoke could persist or return for weeks to months as fires continue; cities have opened cooling centers and distributed masks.
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