Heat Advisory: Washington; Shenandoah; Frederick; Page; Warren; Clarke; Hampshire; Morgan; Berkeley; Jefferson; Hardy

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Heat Advisory — Washington; Shenandoah; Frederick; Page; Warren; Clarke; Hampshire; Morgan; Berkeley; Jefferson; Hardy Severity: Moderate. Certainty: Likely. * WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 107 expected. For the Heat Advisory, heat index values up to 105 expected. * WHERE...Portions of north central Maryland, northwest Virginia, and eastern and panhandle West Virginia. * WHEN...For the Extreme Heat Warning, from 10 AM this morning to 8 PM EDT this evening. For the Heat Advisory, from 10 AM to 8 PM EDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.