Extreme Heat Watch issued June 21 at 2:44PM EDT until June 23 at 9:00PM EDT by NWS Baltimore MD/Washington DC

* WHAT...
For the Heat Advisory, heat index values up to 103 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 107 possible.

* WHERE...
In Maryland, Washington County. In Virginia, Clarke, Frederick, Page, Shenandoah, and Warren Counties. In West Virginia, Berkeley and Jefferson Counties.

* WHEN...
For the Heat Advisory, from noon to 8 PM EDT Sunday. For the Extreme Heat Watch, from late Monday morning through Monday evening.

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

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