Extreme Heat Warning

* WHAT...Dangerously hot conditions with heat index values up to 100.

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

* WHEN...Until 1 AM CDT Tuesday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* ADDITIONAL DETAILS...Heat index values up to 108 expected in northern Ashland and Bayfield Counties along the South Shore. Little to no relief from the heat is possible Sunday night as continued very warm heat indices in the 70s are forecast Sunday night.