NWS Baltimore MD/Washington DCXH.W 0004July 3, 2026
Extreme Heat Warning: District of Columbia, Frederick, Carroll and 32 more, DC and MD
The National Weather Service office in Baltimore MD/Washington issued an extreme heat warning for District of Columbia, Frederick, Carroll and 32 more in District of Columbia, Maryland, Virginia, which was in force until 9:00 p.m. local time on July 4. It was the 4th extreme heat warning the NWS office in Baltimore MD/Washington issued in 2026. District of Columbia had 3 extreme heat warnings in July 2026, against 1 in an average July of 2008-2025.
ExpiredWarning
In force for 11 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Baltimore MD/Washington DC
- Area
- District of Columbia, Frederick, Carroll and 32 more
- State
- District of Columbia
- Level
- Warning
- Issued
- 9:41 a.m. EDT, July 3, 2026
- In force from
- 10:00 a.m. EDT, July 4, 2026
- Expires
- 9:00 p.m. EDT, July 4, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Expected
- VTEC event
- KLWX XH.W 0004
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
* WHAT...Dangerously hot conditions each afternoon with heat index values between 110 to 115 expected. * WHERE...Washington DC, and portions of central, north central, northeast, northern, and southern Maryland, and central, northern, and northwest Virginia. * WHEN...For the first Extreme Heat Warning, until 9 PM EDT this evening. For the second Extreme Heat Warning, from 10 AM to 9 PM EDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Early morning low temperatures in the 70s and 80s combined with oppressive humidity will result in little to no overnight relief. Prolonged excessive heat may impact power, water, and transportation systems. Heat index values around 100 are possible again Sunday afternoon.
What the agency told people to do
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. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.