Extreme Heat Warning

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 102 degrees expected.

* WHERE...In Minnesota, Crow Wing, Aitkin, Pine, Cass, South Itasca, and Carlton and South St. Louis Counties. In Wisconsin, Bayfield, Burnett, Douglas, and Washburn Counties. This includes the Tribal Lands of the St. Croix Band in Burnett County, the Red Cliff Band, the Fond du Lac Band and the Mille Lacs Band, East Lake, Hinckley, Lena Lake and, Big Sandy Lake areas. Other locations including the Apostle Islands National Lakeshore.

* WHEN...For the Dense Fog Advisory, until 9 AM CDT this morning. For the Extreme Heat Warning, from 11 AM this morning to 9 PM CDT this evening.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Low visibility could make driving conditions hazardous.