A line of strong thunderstorms rumbled through the nation's capital Saturday evening, forcing thousands of July 4th revelers to evacuate the National Mall and delaying President Donald Trump's celebration of America's 250th birthday.

Tens of thousands who had gathered on the Mall for the "Salute to America" events were ordered to evacuate but remained ready to party when the weather cleared.

“The safety of our guests, performers, and staff is our top priority. Due to approaching severe storms, Freedom 250, United States Secret Service, United States Park Police, National Park Service, the Federal Emergency Management Agency, and all public safety partners are asking all guests to evacuate event grounds and seek temporary shelter in a nearby building," Freedom 250 spokesperson Danielle Alvarez said.