A scene from the third “Transformers” movie, which was filmed in the District in 2010. (Tracy A. Woodward/The Washington Post)

A warning to drivers and residents near Dulles International Airport on Saturday: Do not panic.

There will be sirens, fire and smoke at the airport. You may see emergency vehicles traveling at high speeds.

The action is part of an emergency drill airport officials will be conducting, which will include a simulated airplane accident on one of the runways. Think of it as a “Transformers” movie sans Michael Bay.

(Incidentally, the Theodore Roosevelt Bridge will be closed on Sunday for filming on an actual movie — the sequel to “Captain America.”)

But we digress.

More than 100 people are expected to participate in the emergency exercise at Dulles. The sights and sounds may be especially apparent for those near Route 606, Route 28 and the Dulles Access Highway. The action is slated to begin around 9 a.m. and will last roughly three hours.

The exercise is not open to the public.