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Hazardous Smoke from Canadian Wildfires Triggers U.S. Air Quality Alerts

Smoke from over 180 Canadian wildfires is forecast to linger through Wednesday, triggering air quality warnings across multiple U.S. regions.

Smoke from wildfires in Canada shrouds the skyline of lower Manhattan and One World Trade Center at sunset on August 16, 2024, in New York City.
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Overview

  • Canada’s wildfire crisis has reached Level 5 preparedness, with 181 active blazes and 92 classified as out of control.
  • The fires have scorched more than 3.7 million acres and forced over 17,000 residents to evacuate in Saskatchewan and Manitoba.
  • Drifting smoke has prompted U.S. EPA warnings and state-issued air alerts from Minnesota and Wisconsin down to Alabama and Florida.
  • Minnesota’s air quality alert has been extended through Wednesday and the Bay Area Air District has advised limiting outdoor exposure through Tuesday.
  • Health officials recommend that sensitive groups, including children, older adults and those with respiratory conditions, stay indoors until smoke levels subside.