Warring robotic clans, spectacular conflagrations and a Camaro named Bumblebee came to Chicago’s streets in July and August — along with some Hollywood stars — as the big budget “Transformers 3” filmed downtown.

With the production slated to wrap up on Sept. 2, Skyline hit the streets to find out just how the citizens of our fair city reacted to the street closings and celebrity sightings on and around the Magnificent Mile.

Tony Sandifer, a security officer at the Wrigley Building, was able to zoom in and out on the mayhem on Michigan during the first week of filming with the aid of a closed circuit TV.

“I was here when that guy, what’s his name … , Shia LeBeouf, was running to the car with the model from Victoria’s Secret. They kept running back and forth repeatedly, and she was running in heels, so it was kind of funny,” said Sandifer.

That scene took place right after transformers had chased the star into a burning car, Sandifer said. “They had just jumped off Trump Tower in parachutes and glided over Wacker Drive. Then you heard the ta-ta-ta-ta-ta of machine guns,” he explained.

“Did it cause some inconveniences — yes, but it was exciting,” said Sandifer. “I’m really looking forward to seeing how they put it together with the special effects.”

Ron Rymarczyk, who works in IT in an office in the Wrigley Building, confessed that he was caught off guard one morning by Michigan Avenue’s transformation into an urban wasteland.

“When I got to work that morning the streets were just littered with destruction, and I actually thought a bomb had gone off,” said Rymarczyk.

He said it was definitely a distracting day at the office. “We had front row seats in our conference room, and every time a bomb went off people would run to the window.”

Fannie May Candies, at the corner of Wacker and Michigan, saw foot traffic diminish by a third when Michigan Avenue closed over a weekend, said store manager Doug Tyska. “Those are usually our biggest days — Friday, Saturday, Sunday,” said Tyska.

With both Wacker Drive and the Michigan Avenue bridge closed for three days each, and pyrotechnics echoing throughout the downtown, Rich Moskal, director of the Chicago Film Office, said the logistics went off smoothly, thanks to extensive coordination between the production team, the Greater North Michigan Avenue Association, the CTA and even tour boat companies on the river.

Other area merchants reported little negative impact.

City officials have given the Paramount production team glowing reviews for its stay in the city. Moskal said the producers estimate that $20 million will flow to the city as a result of hotel stays, hiring and other consumption generated by the production.

Mike Demers, who works at Pearle Vision in the Wrigley Building, said the filming that shut down Michigan did not affect business, and the store remained open for normal hours. “We were really surprised by how fast they cleaned up,” said Demers. “It was very efficient.”

“The best thing,” added coworker Stacy Riley, “was that I got to see Shia LeBeouf.”

Jim Bayci, operates a 7-11 at 35 E. Wacker. The convenience store closed down for four days while a crew filmed a fight scene between Patrick Dempsey and LeBeouf outside his storefront.

Bayci described the production company as “very supportive” of his business, noting that he was compensated for the closing and drew lots of store traffic from the film crew.

The best part, he added was when Patrick Dempsey invited his wife and daughter to pose with him for a photo.

“Patrick Dempsey’s just a super nice guy,” said Bayci.

“I’d be sitting in my apartment, and I’d suddenly hear “Boom! Boom!” said Carol Minkel, a resident of nearby Marina City condos. “They sometimes filmed until 8 or 9 at night, but it was worth it — all in all it’s a great thing for showcasing the city.”

“This film seemed to capture people’s interest and imagination far more than most in the past, in my experience,” said Moskal.

Ald. Brendan Reilly (42nd Ward) reported only “a handful” of complaints about disruptions to traffic and infrastructure.

“I was actually surprised that we didn’t receive that many complaints this summer,” said Reilly, who praised the logistical coordination between the police department, the production team and the city’s transportation department. “Obviously, big movies like this are going to be disruptive.”

Harold Bustle often plies his trade just north of the Michigan Avenue Bridge, posing for snapshots as a silver-coated human statue or “still mime.”

“At first my gross went way down, but after the first couple days, it tripled my money,” said Bustle. “Crowds would come down here when they heard bombs go off.”

“The thing is, everybody’s star struck,” said Bustle. “Everybody wants to see a star.”