For the second time in three years, noxious clouds of wildfire smoke are smothering Wisconsin, dangerously degrading air quality and restricting people’s ability to go outside. In Madison, smoke began drifting in during the early morning hours on Thursday. By sunrise, the stench of burning forests had settled in and coated the Badger State’s capitol city in a gray smog, compounding a multi-day heatwave bringing temperatures to nearly 100 degrees Fahrenheit.

The smoke originated from 17 wildfires in the Superior National Forest caused by lightning strikes in far northeastern Minnesota. Severe drought and heat fueled the fires, threatening a 1.1 million acre forest that is the most visited wilderness area in the U.S. Rangers are searching for 6,000 to 10,000 people who might be in an area that has been evacuated because of the fires, PBS reported. Officials have cancelled all Boundary Water canoe permits, and closed public access to the Boundary Waters Canoe Area Wilderness as part of a 3.9 million acre closure covering the entire Superior National Forest.

In Wisconsin, the fallout has been far-reaching. A statewide air quality advisory has been issued by the Department of Natural Resources (DNR), with the air expected to remain unhealthy until at least Friday. 

Local health departments from Milwaukee to Kenosha are warning residents to avoid the outdoors as much as possible, especially children, older people, pregnant women and those with respiratory ailments like asthma and heart disease. Even healthy people may experience eye irritation, coughing, sore throats or shortness of breath due to exposure to the smoke. 

“While breathing problems and respiratory health dangers are often considered the biggest health impact from wildfire smoke, it’s important to recognize the impact on cardiovascular health as well,” said Dr. Art Coffey, a board member of the Milwaukee American Heart Association and a ProHealth Care cardiologist. “Wildfire smoke contains a lot of pollutants including fine, microscopic particles linked to cardiovascular risk. As these fires continue to burn, that contaminated smoke is traveling many miles beyond the immediately affected area.” 

A press release from the American Heart Association warns that smoke exposure can increase the risk of sudden cardiac arrest and increase burdens on local emergency services. One study in the Journal of the American Heart Association found that heavy wildfire smoke exposure increased the risk of out-of-hospital cardiac arrests by 70%, with that risk elevated among both men and women, particularly in adults from 35-64 years of age and those in high-poverty communities.

In a new analysis, the environmental advocacy group Clean Wisconsin estimated that 250 premature deaths occur each year in Wisconsin due to wildfire smoke exposure. The environmental group warns that these trends are likely to worsen. From 2010 to 2020, Clean Wisconsin stated, wildfire smoke caused unhealthy air quality conditions in the state for less than one day per year. Since 2020, however, wildfire smoke has caused unhealthy air in Wisconsin for an average of nine days per year. The smoke also carries particulate matter which is so small that it can penetrate the lungs deeply and cross into the blood stream, potentially leading to heart disease, cancer, dementia, blood clots, stroke and early death.

Milwaukee’s health and public works departments have suspended or modified some services. Garbage and recycling collection is suspended until further notice, and the city’s drop-off centers are also closed. The city tow lot closed Thursday afternoon. Air quality in the Milwaukee area is considered dangerous, and people are advised to stay inside, run air conditioning, use portable air cleaners or air filters, wear N95 masks or similar protection if they have to go outside, and to check on their neighbors and loved ones. 

Milwaukee County Executive David Crowley  said in a statement that this has become “the worst air quality on record for our community,” adding, “I encourage everyone to take this situation seriously, limit time outdoors when possible, and follow guidance from public health officials.”

All beer gardens, splash pads, outdoor and indoor pools and wading pools have closed in Milwaukee County parks. Residents rely on some of these services to cope with the high temperatures, but the smoke makes their continued operation unsafe. The Milwaukee County Zoo has also had to move some animals inside and cancel attractions and programming.

The Irwin A. and Robert D. Goodman Pool in Madison in Madison is also closed. In Kenosha, two park pools have closed as well as a municipal golf course, bulk and recycling and compost drop-off sites. A local “Peanut Butter & Jam concert” has also been canceled until further notice.

Climate change, the elephant trumpeting in the room

Experts and advocates stress the connection between repeated wildfire smoke emergencies and climate change, which creates the heatwaves and extreme drought conditions which set the stage for massive blazes.

“Increasingly smoky skies underscore the importance of a rapid transition to clean energy rather than building more polluting fossil fuel infrastructure that further contributes to climate change,” Dr. Paul Matthewson, science program director for Clean Wisconsin, said in a statement. “The faster we can reduce our greenhouse gas emissions and slow climate change, the more summer days we will be able to enjoy outside without worrying about whether the air is safe to breathe.” 

“The wildfire smoke blanketing Wisconsin is a reminder that climate change is not a distant threat,” said Peg Shaeffer, spokesperson for Midwest Environmental Advocates. “It is already harming public health and disrupting our daily lives. While no single fire can be attributed solely to climate change, we know that a warming climate is making large wildfires more frequent and more severe.”

Chelsea Chandler, Clean Wisconsin’s climate, energy and air program director, said, “This is hurting everybody — our kids on the playground, farmers, construction workers.” Chandler added, “The public health threat we are all enduring must be a wakeup call…Wisconsin is moving in the wrong direction. Our energy companies are doubling down on burning dangerous fossil fuels to meet soaring AI data center demand, adding to the hazardous air pollution we breathe and damaging our climate. Wisconsinites are paying the price.”

Chandler said that Wisconsin needs to rapidly employ several policies including:

• Rapidly shutting down Wisconsin’s remaining coal power plants
• Ending investments in fossil fuel-burning infrastructure, such as new methane gas plants and oil pipelines
• Dramatically increasing funding for programs to help Wisconsinites save energy and money
• Investing in public transit and electric vehicle charging infrastructure
• Supporting large-scale wind and solar development
• Removing barriers to rooftop and community solar
• Cultivating  farming practices that truly store carbon in the soil and restore soil health

“These ideas are not new; in fact, many other states are already taking action,” said Chandler. “For example, Wisconsin is last in the Midwest when it comes to wind energy production, far behind our neighbors…We’ve got to realize that Wisconsin is not an island. No community is safe from the impacts of climate change. The question is, what are we — and our state leaders — doing to help?”

It’s a question young people, especially those who have grown up in an era of climate emergency, ask their elders with increasing audacity. Last year, a group of young Wisconsinites attempted to take the government to court, asking the state to eliminate laws that worsen the climate crisis and accusing those in power of robbing them of their right to a safe and stable future due to policies which contribute to climate change. In April, a Dane County judge dismissed the case, saying that although she was sympathetic to the children, that what they demanded was a political question beyond judicial review. 

“Needless to say, we strongly disagree,” said Shaeffer. Midwest Environmental Advocates, which represented the children in the court action. “These kids deserve more than sympathy. They deserve to have their day in court.” 

The children involved in the case had suffered the effects of wildfire smoke exposure in recent years, Shaeffer said in an emailed statement to the Wisconsin Examiner. One 18-year-old girl named Madeline has asthma, and must stay indoors and avoid  the smoke to avoid flare-ups,  preventing her from biking, hiking or running outdoors. Another 16-year-old named Indy must stay indoors for weeks on end due to his asthma. Caroline, a 9-year-old girl, said she feels “trapped” when heat and smoke prevent her from playing outside. Those kinds of experiences were also shared by 18-year-old Lucy, who quit the cross-country ski team because practices were cancelled due to a lack of snow in the winter and smoke in the summer. 16-year-old Ted must do farm chores when smoke is heavy in the air. And 12-year-old Elia suffers migraines which are worsened by the heat and smoke. 

President Donald Trump has repeatedly called climate change a hoax and a scam. Under both his administrations, climate policies ground to a halt as fossil fuel companies were given carte blanche to “drill baby drill,” as Trump is fond of saying.

“These are the real, lived experiences of Wisconsin young people whose health and wellbeing are being harmed by state laws that exacerbate climate change,” said Shaeffer. “We believe the court has both the authority and the obligation to address that harm.”

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Wildfires in northern Minnesota and Canada have caused some of the worst air quality on record for Wisconsin. The entire state remains under an Air Quality Advisory for fine particulate matter from wildfire smoke until noon on Friday, according to the Wisconsin Department of Natural Resources. 

As of 2 p.m. Thursday, most of the state’s air quality was in the “very unhealthy” or “hazardous” Air Quality category. That means that everyone, not just sensitive groups, should avoid outdoor activities, the DNR said.

In areas near Superior, the Air Quality Index rose above 800, while parts of eastern Wisconsin including Milwaukee and Kenosha measured above 650. National Weather Service meteorologist Benjamin Sheppard told Wisconsin Watch these levels are some of the worst on record. 

“What we’ve heard from some of our partners is that the Air Quality Index values that we’re seeing are definitely either never before seen or up there,” Sheppard said. “I’ve been working here for three years, and I’ve seen nothing anywhere near that high.” 

Index values in Wisconsin have exceeded the records set by wildfires in June 2023, DNR spokesperson Craig Czarnecki said in an email, noting that the figures “will still need to be quality assured.” At that time, levels peaked at 273, which means concentrations in Superior and the Milwaukee area have more than doubled. 

The U.S. Centers for Disease Control and Prevention recommends setting up a portable air cleaner or filter in a room that can be closed off from outside air and setting your air conditioner  to recirculate mode if possible or close the outdoor intake damper. 

Fine particulate matter, also known as PM2.5, is a main pollutant released from wildfire smoke that can enter the bloodstream. Dr. Joan Schiller, a member of Healthy Climate Wisconsin and retired medical oncologist, told WPR this can exacerbate lung conditions.

“I don’t think people realize how far away you can be from the fire itself and still have health problems,” Schiller said. “These health problems typically manifest themselves as respiratory problems, such as exacerbation of COPD or asthma or emphysema.” 

How can I check the air quality in my area?

The Environmental Protection Agency monitors the air around the country and compiles an air quality index, or AQI.

Here’s what to know about the index and how to keep tabs on your area, especially in U.S. regions dealing with smoke from Canadian wildfires.

What does the air quality index measure? 

The index rates how clean or polluted the air is each day. The EPA uses this measure to keep tabs on five kinds of air pollutants. The main concern from the wildfire smoke is fine particle pollution. These particles are tiny enough to get deep into the lungs. They can cause short-term problems like coughing and itchy eyes and, in the long run, can affect the lungs and heart.

What do the numbers and colors mean? 

The index categories typically only run from zero to 500 – although levels have reached well above 500 in multiple parts of the state. The higher the number, the worse the air quality. That range is broken down into six color-coded categories. Green or yellow — in the zero to 100 range — the air is pretty clear. Once it gets up to orange, the air quality could be a concern for sensitive groups like children, older adults or those with health conditions.

In the red and purple zones, the air quality is considered unhealthy for everyone.

And if the index gets to maroon — at 301 or above — pollution levels are hazardous.

At these high levels, take precautions to avoid breathing in the dangerous air. That can mean reducing your outdoor activities, running air purifiers inside and wearing a well-fitting mask like an N95 when you’re outside.

What’s the air quality right now? 

Check AirNow.gov, which updates every hour. The site shows a real-time map of the air quality across the country and also includes a forecast for the day ahead. The map pulls in measurements from a network of air monitoring stations across the country. States and cities may also offer more local guidance.

How long will smoke last in Wisconsin? 

According to Sheppard and the National Weather Service (NWS), a southerly wind on Friday means smoke is anticipated to retreat from west to east  – likely bringing an end to the advisory for much of the state. 

“With those southwest winds, the air is going to get kind of clearer and healthier in a southwest to northeast manner,” Sheppard said. “Areas further north and east in Wisconsin are going to be most likely to hang on to that smoke.” 

Areas along Lake Superior may also need to have the advisory extended, NWS said. But Sheppard said winds could bring back a second wave of smoke to the rest of the state as soon as Saturday. 

“The weather models tentatively are telling us that the second batch of smoke could be as strong, or perhaps even worse,” he said. 

The Associated Press contributed reporting, as did Hongyu Liu of Wisconsin Watch.

Wildfire smoke brings hazardous air quality in Wisconsin. Here’s how to stay safe is a post from Wisconsin Watch, a non-profit investigative news site covering Wisconsin since 2009. Please consider making a contribution to support our journalism.