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Mayor Bill de Blasio slashed $6 billion from his budget proposal Thursday — including funding for city pools and other popular summer programs — as officials struggle to balance the books while battling the coronavirus pandemic.

The disease has ripped through the five boroughs, killing more than 11,000 people and devastating key sources of revenue the city depends on to pay for police, teachers, parks, child care for working parents and other key services.

“We found cuts we could make, even if we didn’t feel anything but pain in taking away some of these things,” Hizzoner said.

“We don’t know when this crisis ends,” he added. “We do know it will end, that much we can say, thank god; but, we don’t know when, we don’t know how.”

Hizzoner’s new $89.3 billion spending plan projects that Gotham will lose an estimated $7.4 billion in projected tax revenues over just a 16-month period — $2.2 billion coming from the last four months of the 2020 budget year alone.

In response, de Blasio is proposing the first wide-scale spending cuts of his administration.

His budget would nix popular Department of Youth and Community Development summer programs — including community centers for children; sports, arts and youth leadership programs for middle schoolers; and education, sports and job training for public housing.

The administration had already revealed plans to zero-out the nation’s largest municipal youth employment program, earning widespread criticism.

The cuts also shut down the Parks Department’s pools for the summer — saving $12 million.

Additionally, other key programs face the budget ax:

The 3K pre-kindergarten rollout to three new districts would be delayed, saving $43 million;

The NYPD’s cadet and officer classes would be pushed from April to July, saving $10.7 million;

First Lady Chirlane McCray’s much-criticized mental health initiative, Thrive NYC, faces a $21.7 million cut;

The placard abuse task force would be postponed, a move the city says will save $1.2 million despite rampant reports of abuses.

The Big Apple’s Department of Corrections would see its budget slashed by $250 million over the next several years as the city’s jail population drops and the infamous Rikers Island complex is eventually shuttered.

City budget writers also raided the water authority’s accounts for $128 million to help stabilize the city’s finances.

De Blasio said that the city’s dire financial condition necessitated aid from Washington, where lawmakers are currently battling over a fourth economic rescue package.

“Everyone wants a restart, everyone wants our economy to recover,” Hizzoner said, outlining his request for a $7.4 billion rescue package. “But, there has to be a really clear understanding, if we can’t provide the basics for our people then you can kiss the recovery goodbye.”

The administration’s Thursday proposal is dramatically smaller than the $95.3 billion budget de Blasio rolled out in January, which was already constrained by the city’s fight with Gov. Andrew Cuomo over the future of the Empire State’s Medicaid program.

And it’s $3.5 billion smaller than the $92.8 billion budget approved last year for 2020.

One leading budget expert said de Blasio would likely be forced to go further with spending cuts.

“There should be no illusion that spending reductions will be easy or painless, but they are possible and necessary to stave off more painful actions later,” said Andrew Rein, the president of one of the city’s leading government watchdogs, the Citizens Budget Commission.

Hizzoner and Council Speaker Corey Johnson must pass a budget before July 1.