* WHAT...For the first Extreme Heat Warning, dangerously hot conditions with heat index values up to 108 expected. For the second Extreme Heat Warning, dangerously hot conditions with heat index values up to 110 expected.
* WHERE...Portions of north central and western Maryland, northwest Virginia, and eastern and panhandle West Virginia.
* WHEN...For the first Extreme Heat Warning, until 8 PM EDT this evening. For the second Extreme Heat Warning, from 10 AM to 8 PM EDT Friday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.