* WHAT...Heat index values up to 103 expected.
* WHERE...Portions of northern Connecticut, central, eastern, northeastern, southeastern, and western Massachusetts, and northern and southern Rhode Island.
* WHEN...From 11 AM Tuesday to 8 PM EDT Wednesday.
* IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
* ADDITIONAL DETAILS...Temperatures Tuesday night likely remain near 80 for most of southern New England, leading to poor overnight relief.