United States: Smoke from Canada’s wildfires is once again choking the skies across the Northeastern US and Upper Midwest, triggering new air quality warnings and raising fresh concerns for public health.
On Monday, Michigan issued a statewide air quality advisory, while Wisconsin, New York, Vermont, and Maine continued to experience unhealthy air. Although Minnesota is seeing a slight break, much of the region is still blanketed in haze.
Canada is now enduring its second-worst wildfire season on record, with nearly 4,000 fires reported already this year. The fires aren’t just a Canadian crisis—they’re sending toxic smoke thousands of miles into US cities, putting millions at risk, according to npr.org.
Breathing Wildfire Smoke Is Like Smoking
Dr. May-Lin Wilgus, a lung specialist at UCLA, says inhaling wildfire smoke is comparable to smoking a quarter to half a pack of cigarettes a day—especially when the Air Quality Index (AQI) spikes.
On Monday, Detroit’s AQI hit 159, a level considered “unhealthy.” Any AQI over 100 starts to pose serious health risks, and levels above 150 are especially harmful for people with respiratory or heart issues.
Wildfire smoke contains fine particulate matter (PM2.5) that can deeply penetrate the lungs and bloodstream, making it more dangerous than everyday urban smog.
Who’s Most at Risk?
While no one is truly safe from wildfire smoke, certain groups face higher risks:
- Children: They breathe more air per body weight, which means more smoke.
- Older adults: Their immune systems are weaker, and many already have heart or lung conditions.
- Pregnant people: Smoke has been linked to premature birth and low birth weight.
- People with asthma, COPD, or heart problems: ER visits for these groups double during smoky days.
- Firefighters and first responders: Long-term exposure has been tied to lung cancer and heart disease.
Why This Smoke Is Extra Toxic
According to Lisa Miller, a wildfire smoke expert at UC Davis, wildfire pollution is more dangerous than it seems, as per npr.org.
“It’s not just wood and leaves burning—it’s furniture, carpets, plastics, cars, and homes,” she says. “You’re breathing in a toxic soup.”
This makes wildfire smoke more toxic than other pollution sources like car exhaust.
Climate Change Is Making It Worse
Experts like Tarik Benmarhnia, a climate health researcher at UC San Diego, say wildfire smoke has become a growing threat over the last decade.
“Just 10 years ago, wildfires were rare events for most people. Now, they’re becoming seasonal,” he says.
Rising global temperatures and drier conditions are making fires more frequent, more intense, and harder to contain, leading to longer and more widespread smoke exposure.
How to Protect Yourself
If wildfire smoke is in your area, take these steps to protect your lungs and overall health:
- Stay indoors with windows and doors closed.
- Use a HEPA air filter if available.
- Avoid outdoor exercise or strenuous activity.
- Wear an N95 mask if you need to go outside—it blocks most harmful particles.
- If you can smell smoke, that’s a warning sign: Stay inside and minimize exposure.
- For the especially vulnerable (kids, elderly, pregnant people), limit exposure as much as possible.
“There’s no truly safe level of wildfire smoke,” Miller said. “But every step you take to reduce your dose helps protect your health.”
As the smoke continues to travel and linger, staying informed and prepared is your best defense. Check your local AQI regularly, and take precautions to shield yourself and your loved ones from the hidden dangers in the air.