Expires:202507172045;Remove:202507172045;596486 WWUS71 KLWX 171240 NPWLWX URGENT - WEATHER MESSAGE National Weather Service Baltimore MD/Washington DC 840 AM EDT Thu Jul 17 2025 DCZ001-MDZ008-011-013-014-016>018-508-VAZ053>055-057-527-172045- /O.CON.KLWX.HT.Y.0007.250717T1500Z-250718T0000Z/ District of Columbia-Cecil-Southern Baltimore-Prince Georges-Anne Arundel-Charles-St. Marys-Calvert-Southeast Harford-Fairfax- Arlington/Falls Church/Alexandria-Stafford-King George-Central and Southeast Prince William/Manassas/Manassas Park- 840 AM EDT Thu Jul 17 2025 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING... * WHAT...Heat index values around 105 expected. * WHERE...Portions of DC, central, northeast, northern, and southern Maryland, and central and northern Virginia. * WHEN...Until 8 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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. && $$ KJP