Wildfire smoke and air pollution from burning fossil fuels are causing serious respiratory and cardiovascular damage that extends far beyond burning eyes and coughing. Tiny particles in smoke are small enough to bypass your lungs' natural defenses, enter your bloodstream, and trigger life-threatening conditions like asthma attacks, heart attacks, and strokes. A recent study published in the journal Nature found that wildfire smoke causes more than 41,400 excess deaths in the U.S. each year, with hundreds of those deaths occurring in states like Wisconsin alone.

Why Is Wildfire Smoke So Dangerous to Your Respiratory System?

The danger from wildfire smoke lies in its composition. When forests burn, they release a toxic mixture of gaseous air pollutants and extremely fine particles. Unlike larger dust particles that get trapped in your nose or throat, these microscopic particles are absorbed directly into your bloodstream through your lungs. Once in your bloodstream, they can travel throughout your body and damage multiple organ systems simultaneously.

The health impacts are immediate and severe. Smoke can increase your risk for asthma, lung cancer, and other chronic lung problems. It also increases the risk of heart attacks and is associated with preterm birth and miscarriage in pregnant women. The American Lung Association emphasizes that these tiny particles pose the greatest danger because of their ability to penetrate deep into lung tissue and enter circulation.

Who Is Most Vulnerable to Air Quality Threats?

While wildfire smoke and air pollution affect everyone's health, certain groups experience more severe consequences. Vulnerable populations include children, pregnant women, seniors, and people with pre-existing conditions such as asthma, chronic obstructive pulmonary disease (COPD), heart disease, and diabetes. Additionally, people who work outdoors, those who exercise or play sports outside, and individuals without air conditioning are at higher risk because they're exposed to larger amounts of polluted air.

Fine particle pollution from wildfire smoke can irritate your eyes, nose, and throat, causing coughing, chest tightness, shortness of breath, dizziness, or fatigue. For people with existing lung or heart conditions, poor air quality can trigger serious medical emergencies.

How to Protect Your Lungs During Poor Air Quality Events

• Monitor Air Quality Index (AQI) levels: Check daily AQI forecasts in your area. When the AQI reaches the red, purple, or maroon categories, take protective action immediately rather than waiting for symptoms to develop.
• Stay indoors during hazardous air quality: When air quality reaches the maroon (hazardous) level, everyone should avoid outdoor activity and remain indoors. In purple (very unhealthy) conditions, avoid prolonged or heavy exertion and stay indoors when possible.
• Reduce outdoor physical activity: During red (unhealthy) air quality days, limit prolonged or heavy exertion and take more breaks if you must be outside. Reschedule sports and outdoor events to indoor venues when air quality is poor.
• Keep indoor air clean: Use air conditioning with clean filters, seal windows during smoke events, and consider using HEPA air purifiers to reduce indoor particle levels.
• Seek immediate medical care for warning signs: If you experience severe symptoms, chest pain, trouble breathing, or suspect you may be having a heart attack or stroke, call 911 immediately.

What Role Does Climate Change Play in Worsening Air Quality?

Climate change is amplifying air quality problems across North America. Record warm ocean temperatures create abundant humidity, long-term droughts power massive wildfires, and a warming atmosphere brings hotter days that trap smoke closer to the ground. The World Health Organization has declared climate change "the single biggest health threat facing humanity," and air pollution is a major component of that threat.

Beyond wildfire smoke, smog from burning coal, natural gas, and petroleum remains a persistent global problem. When we burn fossil fuels for energy and transportation, toxic pollutants like sulfur dioxide, mercury, and fine particulates are released into the air along with climate-changing carbon dioxide. These pollutants act just like wildfire smoke in your body, traveling from your lungs to every organ system.

Health impacts from air pollution are well-documented and include lung diseases such as asthma and COPD, heart disease, high blood pressure, stroke, cancer, and worsening diabetes. Poor air quality has a disproportionate impact on seniors and children and is linked to increased risk for dementia and Alzheimer's in older adults, and cognitive function problems in children. Particulate pollution can even cross the placenta and impact babies before they are born.

Is There Any Good News About Air Quality Trends?

Despite current challenges, there is reason for cautious optimism. There is less smog in Wisconsin now than even 30 years ago, thanks to regulations that control emissions from factories, power plants, and vehicles. According to the U.S. Environmental Protection Agency, from 1970 to 2020, the Clean Air Act prevented more than 435,000 premature deaths and prevented millions of cases of disease. This demonstrates that policy-driven environmental protection can save lives.

Looking ahead, public health organizations are taking action. The European Lung Foundation and European Respiratory Society are launching the "Healthy Lungs for Life" campaign, which aims to raise awareness about how to keep lungs healthy and reduce the impact of lung disease worldwide. On September 6, 2026, they will hold a free public event in Barcelona where people can receive free lung function tests and learn about protecting their respiratory health.

If you're experiencing respiratory symptoms during poor air quality events, contact your healthcare provider. Those with severe symptoms should seek immediate medical attention. By understanding the risks and taking protective action, you can significantly reduce your exposure to harmful air pollution and protect your long-term respiratory and cardiovascular health.