An evacuation was ordered Saturday evening at the National Mall as storms gathered around Washington just hours before U.S. President Donald Trump was scheduled to deliver a speech commemorating America's 250th anniversary of independence.

Washington's July 4 celebration attendees this year will have to contend with stepped-up security, possible thunderstorms and temperatures that could top 100F.

The United States of America is marking its 250th anniversary with celebrations President Donald Trump has billed as “the most spectacular birthday party the world has ever seen”.…