Heat Advisory

Locations Affected

Washington, DC ∙ Baltimore, MD ∙ Alexandria, VA ∙ Bowie, MD ∙ Annandale, VA ∙ Herndon, VA ∙ Sealston, VA ∙ Marlow Heights, MD ∙ Brock Hall, MD ∙ Randle Cliff Beach, MD

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 216 AM EDT Sat Jul 18 2026 ...HEAT ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 7 PM EDT THIS EVENING... * WHAT...Heat index values around 105 expected. * WHERE...Washington DC, and portions of central, northern, and southern Maryland, and central and northern Virginia. * WHEN...From 11 AM this morning to 7 PM EDT this evening. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

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