At least six more Big Apple schools are set to start temporarily housing migrants in their gyms, prompting all hell to break loose Monday among parents frantic over safety and potential learning disruptions.

“To bus people to our school and expect the community to absorb them is just insane,” fumed Virginia Vu, a PTA member and parent at Brooklyn’s MS 577 in Williamsburg — adding some parents have already threatened to at least temporarily pull their kids out of the sixth-through-eighth grade school.

“We care about asylum-seekers, and we’re proud our city is a ‘sanctuary city’ — but housing asylum seekers on school grounds is absolutely unacceptable,” she said.

MS 577 shares a gym with PS 17 — one of five Brooklyn elementary schools to soon have asylum-seekers living out of their gymnasiums, too, as New York City struggles to cope with the surging migrant crisis, sources told The Post.

The other targeted elementary schools are PS 18 and PS 132, both in Williamsburg, PS 172 in Sunset Park and PS 189 near Prospect-Lefferts Gardens. PS 17, 18, 132 and 172 all house kindergarten through fifth-grade, while PS 189 goes from kindergarten through eighth grade.

PS 17 and MS 577 were preparing to host busloads of migrants — potentially single male adults — starting as early as Tuesday, parents said.

As of Monday, cots had already been set up inside the MS 577 and PS 17 gym as city officials put finishing touches on the new migrant site.

The developments come just days after adult migrants started moving into the gym at PS 188 on Coney Island in Brooklyn. The gym is now set up as an emergency intake site for asylum-seekers bused to the school, which houses pre-K to fifth-grade students.

The arrival of migrants at the MS 577 and PS 17 campus essentially means kids will now be “trapped inside” for the foreseeable future because the gym backs onto the outdoor playground, according to some parents.

“The school will be under lockdown all day,” Vu said, adding that outdoor after-school activities would also be axed.

“The students will be trapped inside and will not be able to go outside for recess or physical education, which will be a huge detriment to their wellbeing,” she said. “These kids just came through COVID, and now they’re being locked inside the classroom.”

Damaris Fernandez, who has children at both MS 577 and PS 17, said the addition of migrants “is a security issue as well.

“Schools are kept secure for a reason. Parents have to sign in and provide ID when they go into school — now there’s migrants in the playground,” Fernandez said.

In a letter to parents Sunday, MS 577 Principal Maria Masullo insisted that the impact of housing of migrants on school property would be minimal.

“This should not impact school operations, nor will families have access to any other part of the school where students and staff are,” Masullo wrote.

Some parents at PS 172 said they don’t believe anyone who tells them their kids won’t be affected by migrants moving into their building or that there aren’t legitimate safety concerns — adding they are considering removing their children from their school, too.

“No f–king way — I’m not bringing [my kids] back until I’m sure there won’t be grown men in their gym,” said a mom who only gave her first name, Lillian, and has kids in kindergarten and second grade at PS 172.

“That makes no sense. Why would I bring my child to a school where there is grown adult men in their gym? You won’t let a stranger come into the school with no ID, but you’ll let them live in your school gym?” she asked.

Other PS 172 parents ripped Mayor Eric Adams for having city schools accept asylum-seekers in the first place — pointing out that one of the Big Apple’s dozens of migrant shelters had already been set up in a hotel right across the street from the school.

“Mayor Adams is scrambling to solve a problem that is not solved by risking the safety of not only the students but also migrant families,” said mom and PTA co-President Samantha Clarke.

“What kind of solution is the mayor really offering?” she said, adding the school gym only has one adult toilet and no showers.

Gabriela Vizhnay, a parent of a second-grader at the school, said, “I almost cried” when learning of the situation.

“These elementary kids are being sacrificed over something that can be done somewhere else,” she said.

“You’re sacrificing kids. The future of this county.”

PS 132 mom Jennifer Jacobs, who has a 4-year-old girl in pre-K, called the situation “a disaster.

“The city’s handling of the migrant situation has been a complete disaster,’’ she said.

A neon-green notice from the school principal was placed on cars outside PS 132 on Monday saying recess would now be held on the street behind the school and that the vehicles would have to vacate the stretch beginning Tuesday because it will be closed “Monday thru Friday from 9:00 A.M. to 2:00 P.M.”

Multiple parents at both PS 172 and MS 577 said they are arranging to protest outside their respective schools come Tuesday morning.

They called for the city to house the migrants at more appropriate locations.

“This is desperate times,” Vu said. “Maybe they should be using [the] Javits Center or the stadiums or any open space in the city that is not school grounds.”

Neither City Hall nor the city Department of Education responded to The Post’s request for comment Monday.