* WHAT...For the Dense Fog Advisory, visibility of a quarter to half mile in dense fog. For the Heat Advisory, heat index values up to 109 expected.
* WHERE...In Iowa, Monona County. In Nebraska, Burt, Cuming, Madison, Stanton, Thurston, and Wayne Counties.
* WHEN...For the Dense Fog Advisory, until 10 AM CDT this morning. For the Heat Advisory, from noon today to 10 PM CDT Monday.
* IMPACTS...Low visibility could make driving conditions hazardous. Hot temperatures and high humidity may cause heat illnesses.