District of Columbia, Maryland, Virginia Severe Extreme Heat Watch | Effective 06/30/2026 17:12

Headline: 
Extreme Heat Watch issued June 30 at 8:12PM EDT until July 3 at 8:00PM EDT by NWS Baltimore MD/Washington DC
Event: 
Extreme Heat Watch
Urgency: 
Future
Effective: 
June 30, 2026 - 5:12pm
Expires: 
July 1, 2026 - 1:15am
Description: 
* WHAT...For the Heat Advisory, heat index values up to 106 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values up to 110 possible. * WHERE...Portions of DC, central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...For the Heat Advisory, from 11 AM to 8 PM EDT Wednesday. For the Extreme Heat Watch, from Thursday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. 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; Frederick; Carroll; Northern Baltimore; Cecil; Southern Baltimore; Prince Georges; Anne Arundel; Charles; St. Marys; Calvert; Northwest Montgomery; Central and Southeast Montgomery; Northwest Howard; Central and Southeast Howard; Northwest Harford; Southeast Harford; Nelson; Albemarle; Greene; Madison; Rappahannock; Orange; Culpeper; Fairfax; Arlington/Falls Church/Alexandria; Stafford; Spotsylvania; King George; Northern Fauquier; Southern Fauquier; Western Loudoun; Eastern Loudoun; Northwest Prince William; Central and Southeast Prince William/Manassas/Manassas Park
Forcast Office: 
NWS Baltimore MD/Washington DC