Extreme Heat Watch

* WHAT...For the Heat Advisory, heat index values up to 104 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 105 possible.

* WHERE...In Maryland, Central and Eastern Allegany County. In West Virginia, Eastern Grant, Eastern Mineral, Hampshire, and Hardy Counties.

* WHEN...For the Heat Advisory, from 11 AM this morning to 8 PM EDT Wednesday. For the Extreme Heat Watch, from Thursday morning through Friday evening.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.