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yesterday

Canadian Wildfire Smoke Prompts Air Quality Alerts Across North America

Experts predict smoke will persist into August, heightening health risks for vulnerable groups

A stock photo shows a woman coughing while outdoors.
Image
A forecast map from AccuWeather shows which states are likely to see wildfire smoke impacts this summer.

Overview

  • Canada’s 2025 wildfires have burned over 8.6 million acres across more than 200 active blazes, with many remaining out of control.
  • Smoke from Canadian fires has led to air quality alerts in at least ten U.S. states, including Minnesota, Montana and New York, as well as in Alberta.
  • AccuWeather forecasts periodic haze and reduced visibility from June through August, especially in the northern Plains, Midwest and Northeast.
  • Health officials warn that fine particulate matter in wildfire smoke can aggravate asthma, COPD and other respiratory conditions, particularly in children and the elderly.
  • Residents are advised to stay indoors with windows closed, set HVAC systems to recirculate, and use HEPA filters or DIY air purifiers to reduce indoor smoke levels.