More than a dozen migrants created their own mini tent city under the Brooklyn-Queens Expressway this week after being booted from one of the Big Apple’s newest mega shelters — sparking fears of a “new normal” now the city has imposed a 60-day stay limit on some asylum seekers.

The tents popped up under the overpass in Brooklyn’s Clinton Hill neighborhood earlier this week — just steps away from the new large-scale shelter at 47 Hall Street that’s designed to cater for roughly 2,000 single adult migrants.

The group of Venezuelan migrants, who copped to recently being booted from the shelter after a fight with other asylum seekers, subsequently opted to create their tiny encampment — complete with three tents, a huge tarp and multiple mattresses crammed between rows of parked vehicles.

The emergence of the tents triggered immediately concerns from nearby residents in the wake of Mayor Eric Adams’ announcement Wednesday that adult migrants will now only be allowed to stay in shelters for 60 days.

“It’s a ticking time bomb,” a father-of-two told The Post of the new stay limit.

“I’m worried because they’ve got a time limit to find housing. Ultimately, these people are going to resort to living on the streets. There’s going to be encampments showing up left, right and center,” added the distraught Brooklyn resident.

The city’s Homeless Encampment Task Force has already been made aware of the tent structures under the BQE.

Asked about the migrants being kicked out of the shelter, a City Hall spokesperson said in a statement: “The health and safety of asylum seekers in our care is always a top priority. Those refusing to follow the code of conduct at any of our sites will be asked to leave in order to protect those looking for safe shelter for themselves and their families.”

Still, the tent encampment is just the latest eye-sore tied to the new migrant shelter, residents and local business insist.

Ever since Adams revealed that the Hall Street location was being turned into a mega humanitarian relief center nearly two weeks ago, locals say the neighborhood has changed drastically.

“It’s really gone from like zero to 100,” one resident said.

“The amount of trash and smell is significantly higher. We’ve started to smell feces and p–s.”

Dozens of migrants have taken to drinking and smoking in the nearby children’s playground and milling about in the surrounding streets.

“There’s a big problem of people just loitering in this park — drinking, smoking,” the dad-of-two said, adding that he won’t allow his children to play there anymore.

“Its continued to get worse. I’ve called 311 a couple of times for drinking. Police have come and moved them on.”

In addition to the dozens of people loitering about, there’s also portable shower trailers now parked on the street — with the run-off flowing down the street.

“We get the shower water — a steady stream of shower water in the gutter,” an employee at a nearby motorcycle store said.

“There are a few hundred migrants just loitering around, sleeping in the court yards, leaving their garbage all around the store. They hang their clothes outside. It makes the place looks untidy and unwelcoming. Their overall presence makes it in inviting to our customers,” he added.

The employee said their business had already taken a hit amid the migrant influx.

“We can clearly see the effect in our numbers. It’s clear our sales have been affected,” he said. “For us, we are considering leaving.”

Resident and employees alike say they weren’t given any prior warning about the mass influx of asylum seekers, arguing the area isn’t equipped with the right infrastructure to support thousands more people.

“I wouldn’t care if it was a 2000 apartment block of … young professionals or whatever,” the father-of-two said.

“We have a lot of issues with you know, like trash and rats and sanitation, and all that round here. And all of a sudden, we’ve now got to support, you know, 2,000 people that just basically hanging out on the street all day and all night.”

He added: “I put a big blame on Eric Adams and the city for taking in all these people … but with no actual facilities and no plan. It’s not fair to anyone: New York residents or the people who come here. It’s just a massive injustice all round.”

More than 54,800 asylum seekers are currently staying at one of the city’s 188 emergency shelter sites set up to cater for the surge in migrants, according to City Hall’s latest figures.

In the last week alone, roughly 2,800 asylum seekers arrived in the Big Apple — adding to the more than 90,000 that have flooded in since April last year.