Interactive NWS Alert

Radar valid at 800 pm EDT, Jul 30th 2025

DCZ001-MDZ004>006-008-011-013-014-016>018-503>508-VAZ053>057-505-506-
526-527-300515-
/O.EXA.KLWX.HT.Y.0012.250730T1500Z-250731T0000Z/
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-Western
Loudoun-Eastern Loudoun-Northwest Prince William-Central and
Southeast Prince William/Manassas/Manassas Park-
501 PM EDT Tue Jul 29 2025

...HEAT ADVISORY IN EFFECT FROM 11 AM TO 8 PM EDT WEDNESDAY...

* WHAT...Heat index values up to 105 to 109 expected.

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

* WHEN...From 11 AM to 8 PM EDT Wednesday.

* 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.

To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.

&&

iNWS is an experimental service intended for NWS core partners, including emergency managers, community leaders and other government agencies only.