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Canadian Wildfires Trigger Air Quality Alerts in Midwest U.S.

SOUTHEAST US, MIDWEST, NEW YORK CITY TO WASHINGTON, D.C. AREA, JUL 31 – More than 58 million people face heat advisories and over 47 million are under flood watches with unhealthy air quality affecting parts of the Midwest, officials said.

  • Massive wildfires burning across Canada have sent thick smoke into the U.S. Midwest, triggering air quality alerts in several states this week.
  • Persistent northerly winds are transporting the smoke from wildfires in Manitoba and Saskatchewan into Minnesota and neighboring states, while a high-pressure system limits smoke dispersion.
  • Air quality alerts now cover Wisconsin, Minnesota, Michigan, Iowa, Illinois, and parts of Nebraska and Missouri, with cities like Minneapolis, Chicago, and Detroit ranking among the worst worldwide for air pollution.
  • The smoke contains high concentrations of PM2.5 particles that can penetrate deep lungs and worsen heart and respiratory conditions, prompting officials to advise sensitive people to stay indoors and avoid strenuous activity.
  • Officials advise people in impacted regions to follow safety guidelines, limit time spent outdoors, and stay informed through ongoing updates, as poor air quality is anticipated to persist throughout the weekend with the possibility of additional warnings.
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Canadian wildfire smoke brings poor air quality to Midwest as flood threat looms in Carolinas

Wildfire smoke from Canada is blanketing the skies in the Midwest, leaving millions with dangerous breathing conditions.

·United States
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Metro News broke the news in London, United Kingdom on Thursday, July 31, 2025.
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