* WHAT...Heat index values of 95 to 105 expected again on Tuesday. Highest heat index values in far northeast Wisconsin. Heat indices the rest of tonight will only drop to 70 to 75 degrees, which will still be hazardous for anyone without shelter after the heat this afternoon. * WHERE...Portions of central, east central, north central, and northeast Wisconsin. * WHEN...Until 9 PM CDT Tuesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.