Heat Advisory issued July 17 at 4:29PM EDT until July 17 at 8:00PM EDT by NWS Baltimore MD/Washington DC

* WHAT...
Heat index values around 100 expected.

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

* WHEN...
Until 8 PM EDT this evening.

* IMPACTS...
Hot temperatures and high humidity may cause heat illnesses.

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