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 100 degrees expected.

* WHERE...Sawyer County. This includes the Tribal Lands of the Lac Courte Oreilles Reservation.

* 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.