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News release

July 15, 2026

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MPCA communications, news.mpca@state.mn.us

Air quality alert issued due to wildfire smoke for Wednesday, July 15, through Friday, July 17, for east central, central, west central, southeast, north central, south central, northwest, and northeast Minnesota

map of air quality alert issued for July 14, 2026 (evening)

Air quality is expected to reach the maroon AQI category in east central, central, southeast, south central, west central, north central, and northeast Minnesota, which is hazardous for everyone.

The Minnesota Pollution Control Agency (MPCA) has issued an air quality alert for all but far south and southwest Minnesota. The alert takes effect at 8 p.m. on Wednesday, July 15, and runs until 11 a.m. on Friday, July 17. The affected area includes the Twin Cities metro area, Brainerd, Alexandria, Hinckley, St. Cloud, Winona, Moorhead, International Falls, Two Harbors, Hibbing, Ely, Duluth, and the Tribal Nations of Mille Lacs, Prairie Island, Leech Lake, White Earth, Red Lake, Grand Portage, and Fond du Lac.

Very heavy smoke from large wildfires across the Arrowhead and southern Canada will continue spreading south through central, northwest, and portions of southeastern Minnesota through tonight and into Thursday morning. Hourly observations have already surpassed previous records for the Twin Cities, and additional record readings are possible overnight. Existing smoke and additional rounds of heavy smoke will then remain possible across the alert area through Friday morning, when a cold front is forecast to bring in cleaner air. Heat will exacerbate health impacts during periods of poor air quality. The alert may need to be extended for parts of the state beyond Friday morning.

Fine particle levels are expected to reach the maroon air quality index (AQI) category, a level considered hazardous for everyone, across east central, central, southeast, south central, west central, north central, and northeast Minnesota. This area includes the Twin Cities metro area, Brainerd, Hinckley, St. Cloud, Two Harbors, Hibbing, Ely, Duluth, and the Tribal Nations of Mille Lacs, Prairie Island, Grand Portage, and Fond du Lac. In the maroon area, everyone should avoid any outdoor activity and stay indoors.

Fine particle levels are expected to reach the purple air quality index (AQI) category, a level considered very unhealthy for everyone, across west central, north central, central, and northwest Minnesota. This area includes Alexandria, Bemidji, International Falls, and the Tribal Nations of Leech Lake, Red Lake, and White Earth. In the purple area, everyone should avoid prolonged or heavy exertion and stay indoors. 

Fine particle levels are expected to reach the red air quality index (AQI) category, a level considered unhealthy for everyone, across west central, southeast, northwest, south central, central, and north central Minnesota. This area includes Rochester, Winona, Mankato, East Grand Forks, Moorhead, Roseau, and the Tribal Nations of Upper Sioux, White Earth, and Red Lake. In the red area, sensitive groups should avoid prolonged or heavy exertion and limit time spent outdoors. Everyone should limit prolonged or heavy exertion and time spent outdoors. 

Air alert wood smoke-maroon-purple-red

What this alert means

Air moves long distances and carries pollutants. During air quality alerts due to wildfires, the air is mixed with harmful smoke. Wildfire smoke spreads or lingers depending on the size of the fires, the wind, and the weather.

The air quality index (AQI) is color-coded. Air quality alerts are issued when the AQI is forecast to reach an unhealthy level, which includes forecasts in the orange, red, purple, and maroon categories. For a full description of each air quality category, visit airnow.gov.

Maroon air quality: Hazardous

Sights and smells: In areas where air quality is in the maroon AQI category due to wildfires, the sky will look smoky. The air will seem hazy or smoky and you won’t be able to see long distances. The air will smell strongly of smoke.

Health effects: This air is hazardous for everyone, and everyone will be affected. Most people will have irritated eyes, nose, and throat, coughing, chest tightness, or shortness of breath. Anyone could experience serious heart and lung effects such as asthma attack, heart attack, or stroke.

What to do: Avoid physical activity outdoors. Sensitive groups should stay indoors, keep activity levels low, and keep indoor air as clean as possible.

Purple air quality: Very unhealthy

Sights and smells: In areas where air quality is in the purple AQI category due to wildfires, the sky will look smoky. The air will seem hazy or smoky and you won’t be able to see long distances. The air will smell strongly of smoke.

Health effects: This air is very unhealthy for everyone. Anyone could experience serious heart and lung effects such as asthma attack, heart attack, or stroke.

What to do: Avoid prolonged or vigorous outdoor activity. Consider rescheduling sports and other outdoor events or moving them inside. Sensitive individuals should avoid all outdoor physical activity. 

Red air quality: Unhealthy

Sights and smells: In areas where air quality is in the red AQI category due to wildfires, the sky may look smoky. The air will look hazy, and you won’t be able to see long distances. You may smell smoke.

Health effects: This air is unhealthy for everyone. Anyone may begin to experience symptoms such as irritated eyes, nose, and throat, coughing, chest tightness, or shortness of breath. Sensitive or more exposed individuals may experience more serious health effects, including worsening of existing heart or lung disease and respiratory and cardiovascular conditions, possibly leading to an asthma attack, heart attack, or stroke.

What to do: Reduce outdoor physical activities, take more breaks, and avoid intense activities to reduce exposure. Sensitive and more exposed individuals should avoid prolonged or vigorous activities and consider shortening, rescheduling, or moving outdoor events inside.

Who is most at risk

Poor air quality impacts health. Fine particle pollution from wildfire smoke can irritate eyes, nose, and throat, and cause coughing, chest tightness, shortness of breath, dizziness, or fatigue. Smoke particles are small enough that they can be breathed deeply into lungs and enter the bloodstream. This can lead to illnesses such as bronchitis or aggravate existing chronic heart and lung diseases, triggering heart palpitations, asthma attacks, heart attacks, and strokes.

Certain groups experience health effects from unhealthy air quality sooner than others, either because they are more sensitive to fine particle pollution or because they are exposed to larger amounts of it.

Sensitive groups include:

  • People who have asthma or other breathing conditions like chronic obstructive pulmonary disease (COPD).
  • People who have heart disease, high blood pressure, or diabetes.
  • Pregnant people.
  • Children and older adults.

People with increased exposure include:

  • People of all ages who do longer or more vigorous physical activity outdoors.
    • People who work outdoors, especially workers who do heavy manual labor.
    • People who exercise or play sports outdoors, including children.
  • People who don’t have air conditioning and need to keep windows open to stay cool.
  • People in housing not tight enough to keep unhealthy air out, or who do not have permanent shelter.

Anyone experiencing health effects related to poor air quality should contact their health care provider. Those with severe symptoms, chest pain, trouble breathing, or who fear they may be experiencing a heart attack or stroke should call 911 immediately.

Take precautions

Reduce or eliminate activities that contribute to air pollution, such as outdoor burning, and use of residential wood burning devices. Reduce vehicle trips and vehicle idling as much as possible.

Stay informed