Data source: National Weather Service (NWS) Last verified: July 17, 2026

Extreme Heat

Heat Advisory (ADVISORY) - expires July 17, 2026 at 2:15 PM EDT

Areas affected: Douglas; Todd; Morrison; Mille Lacs; Kanabec; Stevens; Pope; Stearns; Benton; Sherburne; Isanti; Chisago; Lac Qui Parle; Swift; Chippewa; Kandiyohi; Meeker; Wright; Yellow Medicine; Renville; McLeod; Sibley; Redwood; Brown; Nicollet; Le Sueur; Rice; Goodhue; Watonwan; Blue Earth; Waseca; Martin; Faribault; Polk; St. Croix; Pierce

Heat Advisory issued July 17 at 1:04AM CDT until July 17 at 9:00PM CDT by NWS Twin Cities/Chanhassen MN

• WHAT...Heat index values up to 100 expected.

• WHERE...Portions of central, east central, south central, southeast, southwest, and west central Minnesota and northwest and west central Wisconsin.

• WHEN...From 1 PM this afternoon to 9 PM CDT this evening.

• IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

What to do: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Source: NWS Twin Cities/Chanhassen MN

Heat Advisory (ADVISORY) - expires July 17, 2026 at 10:00 PM EDT

Areas affected: North Itasca; North Cass; South Itasca; South Cass; Crow Wing; Northern Aitkin; South Aitkin; Carlton/South St. Louis; Pine; Douglas; Bayfield; Ashland; Iron; Burnett; Washburn; Sawyer; Price

Heat Advisory issued July 17 at 12:55AM CDT until July 17 at 9:00PM CDT by NWS Duluth MN

• WHAT...Heat index values up to 97 expected.

• WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Cass, Itasca, and Carlton and South St. Louis Counties. In Wisconsin, Price, Ashland, Bayfield, Burnett, Douglas, Iron, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Bois Forte Band, Deer Creek area, the Fond du Lac Band, the Bad River Reservation, the Red Cliff Band, the St. Croix Band in Burnett County, the northwestern area of the Lac du Flambeau Band, the Lac Courte Oreilles Reservation and the Mille Lacs Band, Hinckley, Lena Lake, East Lake and, Big Sandy Lake areas. Other locations including Madeline Island and the Apostle Islands National Lakeshore.

• WHEN...From 11 AM this morning to 9 PM CDT this evening.

• IMPACTS...Hot temperatures and high humidity may cause heat illnesses.

What to do: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Source: NWS Duluth MN

Air Quality

Air Quality Alert (ADVISORY) - expires July 17, 2026 at 1:00 PM EDT

Areas affected: Douglas; Bayfield; Ashland; Iron; Burnett; Washburn; Sawyer; Price

Air Quality Alert issued July 16 at 9:20AM CDT by NWS Duluth MN

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Ashland, Bayfield, Burnett, Douglas, Iron, Price, Sawyer, and Washburn.

• WHAT...The PM2.5 AQI is expected to reach the Unhealthy (Red) to Hazardous (Maroon) level.

• WHERE...Statewide.

• WHEN...Until noon Friday.

What to do: Sensitive groups: Stay indoors and keep activity levels light. Follow tips for keeping particle levels low indoors.

People with asthma: Follow your asthma action plan and keep quick- relief medicine handy.

People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider.

Everyone: Avoid all physical activity outdoors.

Additional Details:

As of 7 a.m. Thursday morning, widespread Very Unhealthy (Purple) to Hazardous (Maroon) AQI PM2.5 is being observed nearly statewide. Surface analysis at 4 a.m. placed the boundary from approximately Prairie du Chien to Platteville, with cleaner air to the south and west of this boundary in portions of Grant, Lafayette, and Crawford Counties. Although this boundary may meander to the northeast from roughly 9 a.m. to 6 p.m.

Source: NWS Duluth MN

Air Quality Alert (ADVISORY) - expires July 17, 2026 at 1:00 PM EDT

Areas affected: Marquette; Green Lake; Fond Du Lac; Sheboygan; Sauk; Columbia; Dodge; Washington; Ozaukee; Iowa; Dane; Jefferson; Waukesha; Milwaukee; Lafayette; Green; Rock; Walworth; Racine; Kenosha

Air Quality Alert issued July 16 at 9:19AM CDT by NWS Milwaukee/Sullivan WI

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Columbia, Dane, Dodge, Fond du Lac, Green, Green Lake, Iowa, Jefferson, Kenosha, Lafayette, Marquette, Milwaukee, Ozaukee, Racine, Rock, Sauk, Sheboygan, Walworth, Washington, Waukesha.

WHAT...The PM2.5 AQI is expected to reach the Unhealthy (Red) to Hazardous (Maroon) level.

WHERE...Statewide.

WHEN...Until noon Friday.

Precautionary/Preparedness Actions: Sensitive groups: Stay indoors and keep activity levels light. Follow tips for keeping particle levels low indoors. People with asthma: Follow your asthma action plan and keep quick-relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Everyone: Avoid all physical activity outdoors.

Additional Details: As of 7 a.m. Thursday morning, widespread Very Unhealthy (Purple) to Hazardous (Maroon) AQI PM2.5 is being observed nearly statewide. Surface analysis at 4 a.m. placed the boundary from approximately Prairie du Chien to Platteville, with cleaner air to the south and west of this boundary in portions of Grant, Lafayette, and Crawford Counties. Although this boundary may meander to the northeast from roughly 9 a.m. to 6 p.m. today and bring cleaner air further into far southwest Wisconsin, the boundary is then likely to sag back southwest overnight into Friday morning. We then expect to see clearing of the smoke from west to east throughout the day on Friday as southerly winds pick up ahead of an approaching system. Given this setup, we are going to extend the statewide air quality advisory until noon Friday. At that time, it will be possible that we will extend the advisory once again for eastern areas, especially those impacted by Lake Michigan.

Source: NWS Milwaukee/Sullivan WI

Air Quality Alert (ADVISORY) - expires July 17, 2026 at 1:00 PM EDT

Areas affected: Vilas; Oneida; Forest; Florence; Northern Marinette County; Lincoln; Langlade; Menominee; Northern Oconto County; Door; Marathon; Shawano; Wood; Portage; Waupaca; Outagamie; Brown; Kewaunee; Waushara; Winnebago; Calumet; Manitowoc; Southern Marinette County; Southern Oconto County

Air Quality Alert issued July 16 at 9:13AM CDT by NWS Green Bay WI

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for all of northeast Wisconsin.

WHAT...The PM2.5 AQI is expected to reach the Unhealthy (Red) to Hazardous (Maroon) level.

WHERE...Statewide.

WHEN...Until noon Friday.

Precautionary/Preparedness Actions:

Sensitive groups: Stay indoors and keep activity levels light. Follow tips for keeping particle levels low indoors.

People with asthma: Follow your asthma action plan and keep quick-relief medicine handy.

People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider.

Everyone: Avoid all physical activity outdoors.

Additional Details:

As of 7 a.m. Thursday morning, widespread Very Unhealthy (Purple) to Hazardous (Maroon) AQI PM2.5 is being observed nearly statewide. Surface analysis at 4 a.m. placed the boundary from approximately Prairie du Chien to Platteville, with cleaner air to the south and west of this boundary in portions of Grant, Lafayette, and Crawford Counties. Although this boundary may meander to the northeast from roughly 9 a.m. to 6 p.m. today and bring cleaner air further into far southwest Wisconsin, the boundary is then likely to sag back southwest overnight into Friday morning. We then expect to see clearing of the smoke from west to east throughout the day on Friday as southerly winds pick up ahead of an approaching system. Given this setup, we are going to extend the statewide air quality advisory until noon Friday. At that time, it will be possible that we will extend the advisory once again for eastern areas, especially those impacted by Lake Michigan. It is also possible that areas along Lake Superior will see prolonged smoke impacts and need to remain in the advisory.

Source: NWS Green Bay WI

Air Quality Alert (ADVISORY) - expires July 17, 2026 at 1:00 PM EDT

Areas affected: Taylor; Clark; Buffalo; Trempealeau; Jackson; La Crosse; Monroe; Juneau; Adams; Vernon; Crawford; Richland; Grant

Air Quality Alert issued July 16 at 9:12AM CDT by NWS La Crosse WI

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Adams, Buffalo, Clark, Crawford, Grant, Jackson, Juneau, La Crosse, Monroe, Richland, Taylor, Trempealeau, and Vernon

WHAT...The PM2.5 AQI is expected to reach the Unhealthy (Red) to Hazardous (Maroon) level.

WHERE...Statewide.

WHEN...Until noon Friday.

Precautionary/Preparedness Actions: Sensitive groups: Stay indoors and keep activity levels light. Follow tips for keeping particle levels low indoors. People with asthma: Follow your asthma action plan and keep quick-relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Everyone: Avoid all physical activity outdoors.

Additional Details:

As of 7 a.m. Thursday morning, widespread Very Unhealthy (Purple) to Hazardous (Maroon) AQI PM2.5 is being observed nearly statewide. Surface analysis at 4 a.m. placed the boundary from approximately Prairie du Chien to Platteville, with cleaner air to the south and west of this boundary in portions of Grant, Lafayette, and Crawford Counties. Although this boundary may meander to the northeast from roughly 9 a.m. to 6 p.m. today and bring cleaner air further into far southwest Wisconsin, the boundary is then likely to sag back southwest overnight into Friday morning. We then expect to see clearing of the smoke from west to east throughout the day on Friday as southerly winds pick up ahead of an approaching system. Given this setup, we are going to extend the statewide air quality advisory until noon Friday. At that time, it will be possible that we will extend the advisory once again for eastern areas, especially those impacted by Lake Michigan. It is also possible that areas along Lake Superior will see prolonged smoke impacts and need to remain in the advisory.

Source: NWS La Crosse WI

Air Quality Alert (ADVISORY) - expires July 17, 2026 at 1:00 PM EDT

Areas affected: Polk; Barron; Rusk; St. Croix; Pierce; Dunn; Pepin; Chippewa; Eau Claire

Air Quality Alert issued July 16 at 9:07AM CDT by NWS Twin Cities/Chanhassen MN

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Adams, Ashland, Barron, Bayfield, Brown, Buffalo, Burnett, Calumet, Chippewa, Clark, Columbia, Crawford, Dane, Dodge, Door, Douglas, Dunn, Eau Claire, Florence, Fond du Lac, Forest, Grant, Green, Green Lake, Iowa, Iron, Jackson, Jefferson, Juneau, Kenosha, Kewaunee, La Crosse, Lafayette, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Marquette, Menominee, Milwaukee, Monroe, Oconto, Oneida, Outagamie, Ozaukee, Pepin, Pierce, Polk, Portage, Price, Racine, Richland, Rock, Rusk, Sauk, Sawyer, Shawano, Sheboygan, St. Croix, Taylor, Trempealeau, Vernon, Vilas, Walworth, Washburn, Washington, Waukesha, Waupaca, Waushara, Winnebago, Wood.

WHAT...The PM2.5 AQI is expected to reach the Unhealthy (Red) to Hazardous (Maroon) level.

WHERE...Statewide.

WHEN...Until noon Friday.

Precautionary/Preparedness Actions: Sensitive groups: Stay indoors and keep activity levels light. Follow tips for keeping particle levels low indoors. People with asthma: Follow your asthma action plan and keep quick-relief medicine handy. People with heart disease: Symptoms such as palpitations, shortness of breath, or unusual fatigue may indicate a serious problem. If you have any of these, contact your health care provider. Everyone: Avoid all physical activity outdoors.

Additional Details: As of 7 a.m. Thursday morning, widespread Very Unhealthy (Purple) to Hazardous (Maroon) AQI PM2.5 is being observed nearly statewide. Surface analysis at 4 a.m. placed the boundary from approximately Prairie du Chien to Platteville, with cleaner air to the south and west of this boundary in portions of Grant, Lafayette, and Crawford Counties. Although this boundary may meander to the northeast from roughly 9 a.m. to 6 p.m. today and bring cleaner air further into far southwest Wisconsin, the boundary is then likely to sag back southwest overnight into Friday morning.

Source: NWS Twin Cities/Chanhassen MN

Source

Alert data provided by the National Weather Service (NWS). This page shows active alerts only and is refreshed daily. For real-time updates, visit weather.gov.