Tornado Watch In Effect Until 10 p.m.

WASHINGTON - Fourth of July crowds have been evacuated from the National Mall until severe storms pass through the area, according to Rob Lachance, of the U.S. Park Police.

The West Front of the U.S. Capitol also was evacuated due to inclement weather.

The evacuations began at about 5 p.m. as officials determined that severe storms to the west were moving their direction.

Crowds were moved to nearby museums, which will provide shelter. Smithsonian buildings and the Commerce Department are opening up for people to use as shelter.

Meanwhile, Dulles International Airport officials said a "people mover" was struck by lightning at about 6 p.m.

The vehicle had passengers on board, but none were injured, officials said. The vehicle was backing away from the terminial when it was struck. It has a flat tire. Maintenance crews were sent to replace the tire.

Also, during the height of the storm, controllers at Dulles were moved to the basement away from windows at the tower. There were no reported delays.