Storms and heavy winds on July Fourth prompted Park Rangers and event staff to direct visitors at the National Mall to seek shelter at multiple federal buildings, amid record-breaking heat and a code purple air quality alert.
By late evening on July Fourth, families spread across the National Mall found the plan they’d been holding in their heads—fireworks, speeches, celebration—suddenly tied to something less controllable: weather.
Visitors were told to seek shelter as storms moved in and heavy wind gusts disrupted conditions around the D.C. area. Park Rangers, law enforcement personnel, and other event staff directed people to follow their instructions and head indoors. The shelters listed included the Ronald Reagan Building at 1300 Pennsylvania Avenue. NW; the Department of Commerce at 1401 Constitution Avenue. NW; the Department of Agriculture at 1400 Independence Drive. SW; the Department of Education at 400 Maryland Avenue. SW; the Internal Revenue Service at 1111 Constitution Avenue. NW; Voice of America at 330 Independence Avenue. SW; the Thomas Jefferson Memorial at 16 E Basin Drive SW; the National Museum of American History at 1300 Constitution Avenue. NW; the National Museum of Natural History at 1000 Constitution Avenue. NW; and the National Museum of African American History and Culture at 1400 Constitution Avenue. NW.
The warning came before President Donald Trump is scheduled to deliver a speech commemorating America’s 250th anniversary of independence.
For many in the region, the storms weren’t the first blow. People in the D.C. area had already endured a third day of searing heat. Late evening thunderstorms added a new challenge to holiday festivities that had already been changed or canceled because of oppressive and dangerous temperatures.
Outside the Mall, wind was also causing damage and disruption. Reports cited power outages and downed trees in parts of the area, including a Hyattsville, Maryland, neighborhood near Landover Hills, where heavy wind gusts knocked down a tree on Saturday, July 4, 2026.
Even if the storm risk eases later in the evening, the evening still carries pressure: the storm risk is expected to ease later in the evening, in time for fireworks scheduled to begin at around 10:30 p.m. on the National Mall.
Air quality added another layer of concern. The area is under a code purple air quality alert, described as unhealthy for everyone.
The heat itself had already broken records. At Reagan National Airport, the high hit 102 degrees, breaking a record last set in 1919. BWI Marshall also reached 102 degrees, breaking the old record of 100 set in 1898 and 1966. Dulles Airport tied its record high of 97, set back in 1999 and 2002. Triple-digit temperatures also broke records over the previous two days.
Forecasters said the storms were not expected to bring much relief from the heat and humidity. Sunday’s highs are forecast in the high 90s, with more storms predicted in the afternoon and on Monday.
Looking ahead, the forecast calls for showers and storms diminishing after 10 p.m. on Saturday, July Fourth, with hazy and humid conditions and lows from 75 to 80. Sunday is expected to be partly cloudy. hot and humid. with afternoon storms that may be severe and highs from 95 to 100. Monday brings showers and storms, with heavy rain that may cause flooding, and highs of 85 to 90. Tuesday is expected to feature scattered showers with highs in the 80s.
National Mall July Fourth evacuation storms shelter instructions Park Rangers code purple air quality alert record heat Reagan National Airport BWI Marshall Dulles Airport fireworks 10:30 p.m.