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  • Dangerous Heat Arrives in Northern Virginia Ahead of July 4 Holiday
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Dangerous Heat Arrives in Northern Virginia Ahead of July 4 Holiday

The National Weather Service is warning of heat indexes of 107 to 112 degrees over the next few days.

By Debbie Williams July 1, 2026 at 9:48 am

Wednesday’s weather started off mild, but forecasters warn that extreme heat is on the way. The National Weather Service has issued a heat advisory for Wednesday from 11 a.m. to 8 p.m. Heat index values of up to 107 degrees are expected.

NWS has also issued an extreme heat watch for Thursday into Friday, with possible heat index values of up to 112 degrees.

NBC Storm Team4 is predicting 110-degree heat indexes Thursday through Saturday, with severe storms possible on Saturday and Sunday. According to Storm Team4, “our area will experience some of the hottest weather on record. The all-time record of 106° for D.C. has been reached only twice. One in 1918 and once in 1930. D.C. has hit 105° only three times with the last one of those coming in 2012. We won’t get that hot Wednesday, but those numbers are within reach for Thursday, Friday, and maybe even on Saturday for the Fourth of July.”

a thermometer registering over 100 degrees with the sun and sky in the background
Courtesy lamyai/stock.adobe.com

Keeping Safe in the Heat

NWS advises residents to “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.”

During a heat advisory, Dr. Debra Lee, the chief medical officer at Sentara Northern Virginia Medical Center, also advises people to stay inside as much as possible. She says to be careful about wearing sunscreen and staying hydrated.

If outside, it’s critical to take water breaks every hour at least, setting an alarm on your watch or phone if necessary. “Your body is made up of more than 70 percent water,” Lee says. “Becoming dehydrated puts you at much higher risk of heat exhaustion.”

Feature image, lucky-photo/stock.adobe.com

Debbie Williams

Debbie Williams

Senior Editor

Northern Virginia Magazine Senior Editor Debbie Williams is a George Mason University graduate and longtime NoVA resident. She has more than 20 years of experience writing and editing for a variety of nonprofit, lifestyle, and government publications, including for AARP.org and USA TODAY magazines.

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