The National Weather Service has issued an Extreme Heat Warning for Northern Virginia, including Fairfax County, effective Monday morning through Monday evening.
Dangerously hot conditions are expected with heat index values potentially reaching 110 degrees. The combination of high temperatures and humidity will create hazardous conditions — including the potential for heat-related illnesses — for residents across the D.C. area.
An Extreme Heat Watch is also in effect for Tuesday morning through Tuesday evening, as the heat wave continues. Officials are urging residents to take precautions and avoid extended time outdoors this week.
More, below, from NWS.
221 PM EDT Sun Jun 22 2025
…EXTREME Heat Warning IN EFFECT FROM 11 AM TO 9 PM EDT MONDAY…
…EXTREME HEAT WATCH 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 and northern Maryland, 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.
An extreme heat watch is in effect for much of Virginia this week, with heat indexes expected above 110°.
State agencies are working with local leaders and utilities to keep cooling shelters open and the power on. Find shelters and more resources here:
• Richmond:… pic.twitter.com/37Z5oIBl5H
— Governor Glenn Youngkin (@GovernorVA) June 22, 2025
