Canadian wildfire smoke blankets US Midwest, Northeast, affecting millions

Smoky skies and hazardous air quality have descended upon tens of millions of Americans across the Midwest, mid-Atlantic, and Northeast. The pervasive smoke, originating from Canadian wildfires, has blanketed major cities, forcing residents to stay indoors and reduce outdoor activity.

Air quality indexes in cities like Chicago and Detroit reached "hazardous" levels, while Baltimore, Washington D.C., Philadelphia, and Cleveland reported "very unhealthy" conditions. New York City continues to grapple with "unhealthy" air. The widespread pollution has led to some North American cities having worse air quality than major African urban centers.

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There has been a clear intensification in wildfire activity for Canada over the past few weeks. Smoke from major fires – particularly in Ontario – [is] already having severe air quality impacts across cities in the Great Lakes region and the north-eastern United States.

Forecasters predict the smoke will continue its eastward journey across the North Atlantic, potentially impacting Europe. This highlights the vast scale of wildfire pollution and its ability to travel thousands of kilometers, affecting air quality far beyond the immediate vicinity of the fires. Organizers of major events, such as the World Cup final, are closely monitoring the smoke patterns.

While some areas in the Northeast may see temporary relief due to changing wind patterns, there is a concern that an approaching storm system could interact with the smoke, potentially worsening conditions by dragging it closer to the ground. However, air quality is expected to improve after the storm passes.

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Our forecasts show the smoke continuing to move eastwards across the North Atlantic, and potentially towards Europe, highlighting the scale of wildfire pollution and how it can travel thousands of kilometers across borders and impact air quality in places far beyond the fires themselves.