* WHAT...Heat index values in the mid 90s to low 100s expected.
* WHERE...Portions of south central, southwest, and western Maine and central, northern, and southern New Hampshire.
* WHEN...From 11 AM to 8 PM EDT Tuesday.
* IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
* ADDITIONAL DETAILS...Low temperatures in the 70s south of the mountains will cause heat stress to accumulate overnight Tuesday, ahead of another hot day Wednesday.