Extreme Heat Warning In Effect Monday & Tuesday

Heat Index Values could rech over 100 degrees.

District of Columbia-Frederick MD-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-Fairfax-Arlington/Falls
Church/Alexandria-Stafford-Spotsylvania-King George-Southern
Fauquier-Western Loudoun-Eastern Loudoun-Northwest Prince William-
Central and Southeast Prince William/Manassas/Manassas Park-
937 AM EDT Mon Jun 23 2025

...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 9 PM EDT THIS
EVENING...
...EXTREME HEAT WARNING IN EFFECT FROM 11 AM TO 9 PM EDT TUESDAY...

* WHAT...For the first Extreme Heat Warning, dangerously hot
  conditions with heat index values up to 110 expected. For the
  second Extreme Heat Warning, dangerously hot conditions with heat
  index values up to 110 expected.

* WHERE...Portions of DC, central, north central, northeast,
  northern, and southern Maryland, and central and northern Virginia.

* WHEN...For the first Extreme Heat Warning, until 9 PM EDT this
  evening. For the second Extreme Heat Warning, from 11 AM to 9 PM
  EDT Tuesday.

* 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.

Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.



By The National Weather Service, Sterling, Va.