* WHAT...Heat index values mainly as high as 105 to 110 degrees during the afternoon and early evening hours. The overall-highest readings are currently forecast to occur on Sunday.
* WHERE...Portions of north central Kansas and central, east central, and south central Nebraska.
* WHEN...Until 10 PM CDT Monday.
* IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
* ADDITIONAL DETAILS...Overnight low temperatures on tonight and Sunday night will provide only limited relief from the heat, dropping no lower than the low to mid 70s.