District of Columbia Environment & Hazard Risk

The ASOS at Washington Reagan National Airport, KDCA, measured a peak heat index of 108. Approximately 322 people were treated for heat-related illnesses across the National Mall on Independence Day. The ASOS at DCA also observed a high temperature of 103F, which set the record for hottest Independence Day on record in Washington DC.

The ASOS at Washington Reagan National Airport, KDCA, measured a peak heat index of 112. Approximately 240 people were treated for heat-related illnesses at medical tents inside the Great American State Fair grounds on the National Mall. DC Fire & EMS have transported 12 additional patients to area hospitals.

Three people were killed and another suffered life-threatening injuries when they were struck by lightning in Lafayette Park across the street from The White House. A couple (76-year-old male, 75-year-old female) and an unrelated (29-year-old male) succumbed to their injuries from the lightning strike the next day.

A wind gust of 73 knots (84 MPH) was measured by a mesonet at the George Washington University Mount Vernon Campus (1855W). Thousands of trees, branches, wires and poles blew down in Palisades, Wesley Heights, Cathedral Heights, Woodley Park, Observatory Circle, Foxhall Village, Adams Morgan, Cleveland Park, and DuPont Circle, including dozens onto cars, homes and businesses. Several apartment buildings lost their roof, including along Wisconsin Avenue Northwest; other homes particularly in the Wesley Heights neighborhood suffered roof and siding damage from the wind. A large tree blew down onto an SUV on Foxhall Road Northwest, injuring two occupants. The National Zoo was closed for a couple of days due to dozens of trees and large branches that blew down in the park. Massachusetts Avenue Northwest, Canal Road Northwest, Arizona Avenue Northwest, Chain Bridge Road Northwest, Lowell Street Northwest, and Loughboro Road Northwest remained closed for several days due to fallen trees, wires, and storm debris.

There were a few dozen calls for trees blown down in DC. Five people were injured when a five story dwelling under construction collapsed in the 900 block of Kennedy Street Northwest; one person was trapped and later freed. A large tree blew down onto eastbound Massachusetts Avenue Northeast near 10th Street Northeast.

Dozens of trees, branches and wires blew down in Columbia Heights, Petworth, Fort Totten, Michigan Park, University Heights, Brookland, Brentwood, and Trinidad. A large tree blew down onto a residence on Queen Street Northeast, displacing a dozen residents.