District of Columbia, Maryland, Virginia Moderate Heat Advisory | Effective 07/17/2026 23:16

Headline: 
Heat Advisory issued July 18 at 2:16AM EDT until July 18 at 7:00PM EDT by NWS Baltimore MD/Washington DC
Event: 
Heat Advisory
Urgency: 
Expected
Effective: 
July 17, 2026 - 11:16pm
Expires: 
July 18, 2026 - 7:30am
Description: 
* 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.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Area Description: 
District of Columbia; Southern Baltimore; Prince Georges; Anne Arundel; Charles; St. Marys; Calvert; Fairfax; Arlington/Falls Church/Alexandria; Stafford; Spotsylvania; King George; Central and Southeast Prince William/Manassas/Manassas Park
Forcast Office: 
NWS Baltimore MD/Washington DC