Heat Advisory

* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Heat Advisory, heat index values up to 100 expected.

* WHERE...Brown County.

* WHEN...For the Dense Fog Advisory, until 10 AM CDT this morning. For the Heat Advisory, from 1 PM this afternoon to 9 PM CDT Sunday.

* IMPACTS...Hot temperatures and high humidity may cause heat illnesses. Low visibility could make driving conditions hazardous.