Heat Advisory

Locations Affected

Duluth, MN ∙ Sandstone, MN ∙ Union, WI ∙ Iron Junction, MN ∙ Bashaw, WI ∙ Canyon, MN ∙ Frog Creek, WI ∙ Wales, MN ∙ Herbster, WI ∙ Bayview, WI

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Duluth MN 1157 AM CDT Sun Jul 19 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... * WHAT...Heat index values up to 90 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 Lac Courte Oreilles Reservation, the St. Croix Band in Burnett County, the Mille Lacs Band, East Lake, Hinckley, Lena Lake and, Big Sandy Lake areas and the Bois Forte Band, Deer Creek, Nett Lake and, Lake Vermilion areas. Other locations including Madeline Island, the Apostle Islands National Lakeshore and Voyageurs National Park. The entire Boundary Waters is also included. * WHEN...Until 8 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

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