* WHAT...Maximum heat index values around 100.
* WHERE...A portion of central Pennsylvania.
* WHEN...Until 8 PM EDT this evening.
* IMPACTS...Hot temperatures and high humidity may cause an increase
in heat-related illnesses.
* ADDITIONAL DETAILS...The risk of heat-related impacts is expected
to reach its highest level this afternoon. The early season heat
persisting over multiple days combined with light winds, limited
cloud cover, and very warm nights will exacerbate heat stress.