New York City Mayor Eric Adams insisted Sunday the Big Apple is about to be struck by a “financial tsunami” because of the raging migrant crisis — doubling down on his warning that the relentless influx will “destroy” Gotham.

Hizzoner predicted the fiscal disaster will force women and their children to be housed with single men and could threaten public safety, just days after a violent scuffle between cops and migrants during a crackdown over illegal scooters.

Adams added that President Biden needs to push for more control at the border — including by instituting a “stay in place” order for migrants in Mexico until they “are allowed entry,” as opposed to illegally streaming across the US southern border and then claiming asylum.

“I have to be honest with New Yorkers with what we’re about to experience — a financial tsunami that I don’t think this city has ever experienced,” Adams told PIX 11’s “PIX on Politics.”

“This is not utopia. New York City cannot manage 10,000 people a month with no end in sight,” he said. “That can’t happen, and that is going to undermine this entire city.”

Adams refused to back off his controversial dire claim last week that the overwhelming crisis will “destroy” the city, arguing all services would be affected, given the price tag is estimated to reach a mind-boggling $12 billion over the next three years.

“Every service in the city is going to be impacted, from child service to our seniors to our housing plan, everything will be impacted,” Hizzoner said Sunday.

“We have a fiscal cliff that’s about to hit us from the federal government.

“This can undermine this entire city, my children, my families, the long‑term impact to migrants who are not getting the proper treatment they deserve, these cuts in services to the children of the city, my elders and seniors, my housing,” Hizzoner said.

“I’m not going to lie to the people of this city on the danger we’re in right now,” he said.

Adams also took another swipe at his fellow Dems in the Biden White House as well as Gov. Kathy Hochul, saying, “Right now, New York City is carrying the weight of a national problem with little or no help.

“There’s a minimum amount of money that comes in that we have to address this crisis as a national crisis, and we’ve been ignored,” he said.

The mayor issued the grim outlook a day after revealing that all city agencies could have to slash up to 15% from their budgets by the spring so that the Big Apple can manage the sky-rocketing costs of the crisis.

City agencies had already been warned they would need to cut 5% from their budgets by November, but Adams said additional cuts will be needed in both January and April if the federal and state governments don’t cough up extra financial aid by early next year.

“We’re going to show New Yorkers exactly what we’re faced with because transparency is crucial here. I have to be honest to New Yorkers what we are up against,” Adams said.

“We’re talking $12 billion, $12 billion of running our city: sanitation, police, education, libraries, everything that we have to run the city. There’s a minimum amount of money that comes in that we have to address this crisis as a national crisis, and we’ve been ignored,” he said.

In addition to federal aid, Adams — who has repeatedly ripped Biden for ignoring his pleas for help — called on the federal government to tighten its border policies to help stem the relentless influx of migrants flooding into the city.

“We need to have a policy, I believe, of staying in Mexico or any of the bordering localities until you are allowed entry. So, I believe stay in place is the way you need to be thinking, until you are allowed in,” Adams said.

“I don’t have the legal authority to tell people they can leave, only the federal government can do that. It’s against the law to tell buses that you can’t come in. Many New Yorkers don’t realize that the laws prevent to say we don’t have any more room, you can’t come to the city,” he continued.

“I would love to do that, because that’s the humane thing to do, because it’s wrong to have people come to the city and treat them in a manner in which we’re doing, and it’s wrong for New Yorkers to have to experience this.”

Adams called on the state, too, to step up — arguing the economic burdens of a national crisis shouldn’t just fall on Big Apple residents alone.

“The problem is also not only with what the federal government could do, the state needs to play their role, also,” he said. “The decompression strategy should go throughout the state. New York City is the economic engine of the state. This should not be on New York City residents only.”

The city has opened more than 200 emergency sites to cater for the more than 110,000 migrants that have arrived since spring 2022, but Adams has long warned the city’s shelter system is at capacity.

“We’re going to have to eventually move women and children into congregant settings,” he said of the shelters. “Some migrants may have to move out into these outside tents. This is wrong, what we’re doing to them, not allowing them to work and provide for themselves.”

While Adams faced some backlash from critics last week after he cautioned the crisis could “destroy” the city, former New York Gov. David Paterson praised him Sunday, insisting is was a “call to arms.

“I saw it as rather a surprising dose of honesty,” Paterson told WABC’s “Cats Roundtable,” referring to Adams’ comment. “Yeah, sometimes, even as a leader, you’re not quite sure which way things are going … It’s a call to arms that everybody in the city and the state get together.

“This is going to happen in other states,” Paterson said. “And the federal government is going to have to be accountable for this situation, which didn’t have to happen when it happened. There could’ve been time for planning. Using some of the federal facilities to help with the migrants.

“There are a whole lot of things that they could’ve done, but they just sent the migrants here, and we have to live with it … The mayor… is trying to seek out solutions. But we’ve gotten a surprising silence from the entities that caused this problem in the first place. And I think it’s a shame.”