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Hot, stormy weather impacts July Fourth events in DC region

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The extremely hot and stormy weather on this Fourth of July led visitors at the National Mall to briefly evacuate and delay the massive fireworks show.

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People in the D.C. region were enduring a third day of searing heat, and now thunderstorms that are packing a punch.

The late evening storms added a new challenge to holiday festivities, several of which have already been changed or canceled due to the oppressive and dangerous heat.

Other than the storms, heavy winds are playing a huge role as there are reports of power outages and downed trees in parts of the area.

WTOP’s Jose Umaña reports that heavy wind gusts knocked down a tree in a Hyattsville, Maryland, neighborhood near Landover Hills.

Downed tree in Prince George's County
Heavy wind gusts knocked down a tree in a Hyattsville neighborhood near Landover Hills on Saturday, July 4, 2026. (WTOP/Jose Umaña)
(Courtesy NWS)

The storm risk is expected to ease later in the evening, in time for the fireworks on the National Mall.

Stinneford said the area is under a code purple air quality alert, which is unhealthy for everyone.

Amid the intense temperatures, Reagan National Airport broke a record last set in 1919: The high there hit 102 degrees.

BWI Marshall hit 102, breaking the old record of 100 set in 1898 and 1966.

Dulles Airport has tied its record high of 97, set back in 1999 and 2002.

Soaring triple-digit temperatures also broke records over the previous two days.

Independence Day storms are not expected to provide much relief from the heat and humidity. Sunday’s highs are in the high 90s, and more storms are predicted in the afternoon and on Monday.



OVERNIGHT: Showers and a few thunderstorms, ending after midnight. Patchy fog developing. Muggy. Lows 75 to 80.

SUNDAY: Partly cloudy, hot and humid with afternoon storms. Storms may be severe. Highs 95 to 100.

MONDAY: Showers and storms. Heavy rain may cause flooding. Highs 85 to 90.

TUESDAY: Scattered showers. Highs in the 80s.

WEDNESDAY: Mostly sunny. Highs in the mid-80s.

Power Outage Map

 

Current Conditions

WTOP’s Will Vitka and Tadiwos Abedje contributed to this report.

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Hot, humid week ahead for DC area with severe storm risk

A dangerous heat wave will grip the D.C. area through Thursday, with highs in the mid to upper 90s and heat index values between 100 and 105. Hot and humid conditions are expected through Thursday, according to the National Weather Service, which said to expect daily thunderstorm chances and a risk of severe thunderstorms. 7News Meteorologist Eileen Whelan told WTOP that most of Tuesday will stay dry, but a few late-day thunderstorms are possible, especially north and east of D.C. as storms drift south from Pennsylvania. Any storm could produce damaging wind gusts and hail, but Whelan reiterated "storm chances are low" on Tuesday. Due to a lack of air conditioning, Parkdale High School in Riverdale, Maryland, closed early at 10:30 a.m. on Tuesday, Prince George's County Public Schools said in a social media post.
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