The National Weather Service has issued a Heat Advisory for Arlington and much of the D.C. area.
Heat index values are expected to reach around 105 degrees Thursday, creating potentially hazardous conditions for outdoor activities.
The advisory covers a wide swath of the region, including Washington, D.C. and portions of central, northern, and southern Maryland, along with central and Northern Virginia. It will be in effect between 11 a.m. and 8 p.m.
Officials warn that the combination of hot temperatures and high humidity may cause heat-related illnesses, particularly for vulnerable populations and those working or exercising outdoors.
More from NWS:
URGENT – WEATHER MESSAGE
National Weather Service Baltimore MD/Washington DC
439 PM EDT Wed Jul 16 2025…Heat Advisory IN EFFECT FROM 11 AM TO 8 PM EDT THURSDAY…
* WHAT…Heat index values around 105 expected.
* WHERE…Washington DC, and portions of central, northern, and southern Maryland, and central and Northern Virginia.
* WHEN…From 11 AM to 8 PM EDT Thursday.
* 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.
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.
