Thousands of visitors in a remote Minnesota wilderness had to evacuate as wildfires spread heavy smoke across the U.S. Midwest and Northeast. Over 100 wildfires burn in Canada, and winds have carried the smoke southeast, triggering unhealthy air condition warnings from Minnesota through Toronto and into New York. Meteorologist Tyler Hasenstein from the National Weather Service in Chanhassen, Minnesota, advised staying indoors to avoid smoke and extreme heat.
Rangers in northeastern Minnesota tried to evacuate thousands from the Boundary Waters Canoe Area Wilderness. The area closed Tuesday as about 17 fires ignited by lightning spread across the region. Estimated between 6,000 to 10,000 people were inside the 1.1-million-acre wilderness, comparable in size to Delaware, according to Superior National Forest spokesperson Joy VanDrie.
It’s an arduous job,
VanDrie said, noting the challenging task for rangers and campers who had to canoe or carry their boats over land to evacuate. By Wednesday, officials had evacuated about 90% of the people, with no injuries or deaths reported.
Jan Bailey, camping with family and friends, recounted a narrow escape after noticing smoke on the horizon. Two hours later, they faced a raging firestorm. A fellow camper with a satellite phone contacted forestry rangers, who dispatched a rescue boat.
The Canadian Air Force assisted with evacuations, rescuing youth campers who crossed the border. Gov. Tim Walz mentioned some fires in the Boundary Waters will burn indefinitely but will be monitored for safety.
Drought-Fueled Fire Season
Severe drought and heat have intensified the wildfire season. Dan Westervelt from Columbia University’s Climate School noted that the conditions provide ample fuel for wildfires. Research links warming temperatures from fossil fuel use to more frequent, intense fires.
Wildfire smoke’s fine particulate matter is dangerous for sensitive groups such as children or those with heart or lung ailments. Symptoms may include shortness of breath, coughing, and dizziness. Experts recommend wearing N95 masks outside and using air purifiers or air conditioners indoors.
This season has been busy and deadly in the U.S., with large fires burning across 15 states. Over 16,800 personnel are assigned to firefighting efforts nationwide, and fires have consumed over 5,678 square miles, larger than Yellowstone and Grand Canyon national parks combined.
Smoke and Temperature Challenges
In Minnesota, officials warned fires might burn for months. Patty Thielen from the state Department of Natural Resources said significant fires could last until snowfall. Minneapolis temperatures reached 96 degrees Fahrenheit on Wednesday, with forecasts of over 90 degrees for the rest of the week.
States like Michigan and Wisconsin faced air quality warnings, affecting regions as distant as Maine. Intense smoke may spread as far south as Washington, D.C., by midday Thursday.

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