Extreme Heat Watch issued June 23 at 4:02AM EDT until June 24 at 9:00PM EDT by NWS Baltimore MD/Washington DC

* WHAT...
For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 107 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 109 possible.

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

* WHEN...
For the Extreme Heat Warning, from 11 AM this morning to 9 PM EDT this evening. For the Extreme Heat Watch, from Tuesday morning through Tuesday evening.

* IMPACTS...
Heat related illnesses increase significantly during extreme heat and high humidity events.

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