Extreme Heat Watch

Locations Affected

Washington, DC ∙ Baltimore, MD ∙ Alexandria, VA ∙ Frederick, MD ∙ Rockville, MD ∙ Gaithersburg, MD ∙ Bowie, MD ∙ Glyndon, MD ∙ Rose Haven, MD ∙ Kearneysville, WV

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 1027 PM EDT Sat Jun 21 2025 ...EXTREME HEAT WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING... * WHAT...Dangerously hot conditions with heat index values up to 110 possible. * WHERE...Washington DC, and portions of central and northern Maryland and northern Virginia. * WHEN...From Monday morning through Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. 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.

---