* WHAT...Dangerously hot conditions with heat index values up to 110 possible.
* WHERE...In Maryland, Dorchester, Inland Worcester, Somerset, and Wicomico Counties. In Virginia, Eastern King William, Eastern King and Queen, Lancaster, Middlesex, and Northumberland Counties.
* WHEN...From Thursday morning through Friday evening.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.