Extreme Heat Watch
URGENT - WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
229 PM EDT Sun Jun 22 2025
DCZ001-MDZ005-006-008-011-013-014-016>018-504>508-VAZ053>057-502-526-
527-230230-
/O.CON.KLWX.XH.W.0001.250623T1500Z-250624T0100Z/
/O.CON.KLWX.XH.A.0002.250624T1500Z-250625T0100Z/
District of Columbia-Carroll-Northern Baltimore-Cecil-Southern
Baltimore-Prince Georges-Anne Arundel-Charles-St. Marys-Calvert-
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-Northwest Prince William-Central and
Southeast Prince William/Manassas/Manassas Park-
229 PM EDT Sun Jun 22 2025
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 11 AM TO 9 PM EDT
MONDAY...
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...
* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with heat index values up to 110 expected. For the Extreme Heat
Watch, dangerously hot conditions with heat index values up to 110
possible.
* WHERE...Washington DC, and portions of central, southern, and
northern Maryland, and central and northern Virginia.
* WHEN...For the Extreme Heat Warning, from 11 AM to 9 PM EDT
Monday. For the Extreme Heat Watch, from Tuesday morning through
Tuesday 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.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
229 PM EDT Sun Jun 22 2025
MDZ004-503-VAZ505-506-230230-
/O.CON.KLWX.XH.W.0001.250623T1500Z-250624T0100Z/
/O.CON.KLWX.HT.Y.0001.000000T0000Z-250623T0000Z/
/O.CON.KLWX.XH.A.0002.250624T1500Z-250625T0100Z/
Frederick MD-Northwest Montgomery-Western Loudoun-Eastern Loudoun-
229 PM EDT Sun Jun 22 2025
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 11 AM TO 9 PM EDT
MONDAY...
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...
* WHAT...For the Heat Advisory, heat index values up to 107. For the
Extreme Heat Warning, dangerously hot conditions with heat index
values up to 110 expected. For the Extreme Heat Watch, dangerously
hot conditions with heat index values up to 110 possible.
* WHERE...In Maryland, Northwest Montgomery and Frederick Counties.
In Virginia, Loudoun County.
* WHEN...For the Heat Advisory, until 8 PM EDT this evening. For the
Extreme Heat Warning, from 11 AM to 9 PM EDT Monday. For the
Extreme Heat Watch, from Tuesday morning through Tuesday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events. Hot temperatures and high
humidity may cause heat illnesses.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
229 PM EDT Sun Jun 22 2025
MDZ003-VAZ027>031-WVZ052-053-230230-
/O.CON.KLWX.XH.W.0001.250623T1500Z-250624T0100Z/
/O.CON.KLWX.HT.Y.0001.000000T0000Z-250623T0000Z/
/O.CON.KLWX.XH.A.0002.250624T1500Z-250625T0100Z/
Washington-Shenandoah-Frederick VA-Page-Warren-Clarke-Berkeley-
Jefferson-
229 PM EDT Sun Jun 22 2025
...HEAT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 11 AM TO 9 PM EDT
MONDAY...
...EXTREME HEAT WATCH REMAINS IN EFFECT FROM TUESDAY MORNING THROUGH
TUESDAY EVENING...
* WHAT...For the Heat Advisory, heat index values up to 104. For the
Extreme Heat Warning, dangerously hot conditions with heat index
values up to 107 expected. For the Extreme Heat Watch, dangerously
hot conditions with heat index values up to 107 possible.
* WHERE...In Maryland, Washington County. In Virginia, Clarke,
Frederick, Page, Shenandoah, and Warren Counties. In West
Virginia, Berkeley and Jefferson Counties.
* WHEN...For the Heat Advisory, until 8 PM EDT this evening. For the
Extreme Heat Warning, from 11 AM to 9 PM EDT Monday. For the
Extreme Heat Watch, from Tuesday morning through Tuesday evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events. 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.
Do not leave young children and pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.
&&
$$
