Fuente de datos: National Weather Service (NWS) Última verificación: 19 de julio de 2026

Calor extremo

Nota: Los detalles de las alertas del National Weather Service se muestran a continuación en inglés (idioma original de la fuente). Los encabezados, categorías y resumen están en español.

Heat Advisory (AVISO) - expira July 19, 2026 at 2:15 PM EDT

Áreas afectadas: Koochiching; North St. Louis; Northern Cook/Northern Lake; North Itasca; Central St. Louis; North Cass; South Itasca; South Cass; Crow Wing; Northern Aitkin; South Aitkin; Carlton/South St. Louis; Pine; Douglas; Bayfield; Ashland; Burnett; Washburn; Sawyer

Heat Advisory issued July 19 at 1:12AM CDT until July 19 at 8:00PM CDT by NWS Duluth MN

• WHAT...Heat index values up to 95 expected.

• WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Koochiching, Cass, Itasca, Carlton, St. Louis, and Northern Cook and Lake Counties. In Wisconsin, Ashland, Bayfield, Burnett, Douglas, Sawyer, and Washburn Counties. This includes the Tribal Lands of the Fond du Lac Band, the Bad River Reservation, the Red Cliff Band, the St. Croix Band in Burnett County, the Lac Courte Oreilles Reservation, the Mille Lacs Band, Hinckley, Lena Lake, Big Sandy Lake and, East Lake areas and the Bois Forte Band, Nett Lake, Deer Creek and, Lake Vermilion areas. Other locations including Voyageurs National Park, Madeline Island and the Apostle Islands National Lakeshore. The entire Boundary Waters is also included.

• WHEN...From 11 AM this morning to 8 PM CDT this evening.

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

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

Fuente: NWS Duluth MN

Calidad del aire

Air Quality Alert (AVISO) - expira July 20, 2026 at 1:00 PM EDT

Áreas afectadas: 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 18 at 9:41AM 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 Very Unhealthy (Purple) to Unhealthy (Red) level.

WHERE...Statewide.

WHEN...Until noon Monday.

Precautionary/Preparedness Actions:

For Very Unhealthy (Purple) AQI: Sensitive groups: Avoid all physical activity outdoors. Reschedule to a time when air quality is better or move activities 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 else: Limit outdoor physical activity. Go indoors if you have symptoms.

For Unhealthy (Red) AQI: Sensitive groups: Consider rescheduling or moving all activities inside. Go inside if you have symptoms. 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 else: Keep outdoor activities shorter and less intense. Go inside if you have symptoms.

Additional Details: Another round of smoke will move in from the north-northeast throughout the day on Saturday before settling over the state on Sunday. Most areas are expected to observe Unhealthy (Red) AQI PM2.5, with the heaviest impacts to the northeast where Very Unhealthy (Purple) AQI PM2.5 will be possible. Some areas to the southwest may only experience Unhealthy for Sensitive Groups (Orange) AQI PM2.5.

Fuente: NWS Milwaukee/Sullivan WI

Air Quality Alert (AVISO) - expira July 20, 2026 at 1:00 PM EDT

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

Air Quality Alert issued July 18 at 9:37AM 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, Vernon

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

WHERE...Statewide.

WHEN...Until noon Monday.

Precautionary/Preparedness Actions:

For Very Unhealthy (Purple) AQI: Sensitive groups: Avoid all physical activity outdoors. Reschedule to a time when air quality is better or move activities 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 else: Limit outdoor physical activity. Go indoors if you have symptoms.

For Unhealthy (Red) AQI: Sensitive groups: Consider rescheduling or moving all activities inside. Go inside if you have symptoms. 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 else: Keep outdoor activities shorter and less intense. Go inside if you have symptoms.

Additional Details: Another round of smoke will move in from the north-northeast throughout the day on Saturday before settling over the state on Sunday. Most areas are expected to observe Unhealthy (Red) AQI PM2.5, with the heaviest impacts to the northeast where Very Unhealthy (Purple) AQI PM2.5 will be possible. Some areas to the southwest may only experience Unhealthy for Sensitive Groups (Orange) AQI PM2.5.

Fuente: NWS La Crosse WI

Air Quality Alert (AVISO) - expira July 20, 2026 at 1:00 PM EDT

Áreas afectadas: 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 18 at 9:34AM CDT by NWS Green Bay WI

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Brown, Calumet, Door, Florence, Forest, Kewaunee, Langlade, Lincoln, Manitowoc, Marathon, Marinette, Menominee, Oconto, Oneida, Outagamie, Portage, Shawano, Vilas, Waupaca, Waushara, Winnebago, and Wood.

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

WHERE...Statewide.

WHEN...Until noon Monday.

Precautionary/Preparedness Actions:

For Very Unhealthy (Purple) AQI: Sensitive groups: Avoid all physical activity outdoors. Reschedule to a time when air quality is better or move activities 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 else: Limit outdoor physical activity. Go indoors if you have symptoms.

For Unhealthy (Red) AQI: Sensitive groups: Consider rescheduling or moving all activities inside. Go inside if you have symptoms. 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 else: Keep outdoor activities shorter and less intense. Go inside if you have symptoms.

Additional Details: Another round of smoke will move in from the north-northeast throughout the day on Saturday before settling over the state on Sunday. Most areas are expected to observe Unhealthy (Red) AQI PM2.5, with the heaviest impacts to the northeast where Very Unhealthy (Purple) AQI PM2.5 will be possible. Some areas to the southwest may only experience Unhealthy for Sensitive Groups (Orange) AQI PM2.5.

Fuente: NWS Green Bay WI

Air Quality Alert (AVISO) - expira July 20, 2026 at 1:00 PM EDT

Áreas afectadas: Polk; Barron; Rusk; St. Croix; Pierce; Dunn; Pepin; Chippewa; Eau Claire

Air Quality Alert issued July 18 at 9:31AM CDT by NWS Twin Cities/Chanhassen MN

The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for the following counties: Barron, Chippewa, Dunn, Eau Claire, Pepin, Pierce, Polk, Rusk, St. Croix.

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

WHERE...Statewide.

WHEN...Until noon Monday.

Precautionary/Preparedness Actions:

For Very Unhealthy (Purple) AQI: Sensitive groups: Avoid all physical activity outdoors. Reschedule to a time when air quality is better or move activities 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 else: Limit outdoor physical activity. Go indoors if you have symptoms.

For Unhealthy (Red) AQI: Sensitive groups: Consider rescheduling or moving all activities inside. Go inside if you have symptoms. 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 else: Keep outdoor activities shorter and less intense. Go inside if you have symptoms.

Additional Details: Another round of smoke will move in from the north-northeast throughout the day on Saturday before settling over the state on Sunday. Most areas are expected to observe Unhealthy (Red) AQI PM2.5, with the heaviest impacts to the northeast where Very Unhealthy (Purple) AQI PM2.5 will be possible. Some areas to the southwest may only experience Unhealthy for Sensitive Groups (Orange) AQI PM2.5. This round of smoke may not reach the southwestern half of the state before sunset Saturday, meaning the smoke will arrive overnight, with statewide impacts expected by 6 a.m.

Fuente: NWS Twin Cities/Chanhassen MN

Air Quality Alert (AVISO) - expira July 20, 2026 at 1:00 PM EDT

Áreas afectadas: Douglas; Bayfield; Ashland; Iron; Burnett; Washburn; Sawyer; Price

Air Quality Alert issued July 18 at 9:30AM CDT by NWS Duluth 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 Very Unhealthy (Purple) to Unhealthy (Red) level.

• WHERE...Statewide.

• WHEN...Until noon Monday.

Qué hacer: For Very Unhealthy (Purple) AQI: Sensitive groups: Avoid all physical activity outdoors. Reschedule to a time when air quality is better or move activities 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 else: Limit outdoor physical activity. Go indoors if you have symptoms.

For Unhealthy (Red) AQI: Sensitive groups: Consider rescheduling or moving all activities inside. Go inside if you have symptoms. 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.

Fuente: NWS Duluth MN

Fuente

Datos de alertas proporcionados por el National Weather Service (NWS). Esta página muestra únicamente alertas activas y se actualiza diariamente. Para información en tiempo real, visite weather.gov.