WASHINGTON – Victims of 9/11 and their advocates will head to Washington on Monday to demand reversal of a shocking new announcement that future victims’ compensation payments will be slashed as much as 70 percent.

Among those impacted by the drastic cuts are a new generation of victims whose parents are now too sick or have since passed away from 9/11-related illness.

“Our parents gave their lives,” said Robert Tilearcio Jr, 29, whose firefighter father, Robert, died in 2017 at age 58 from cancer linked to his service at Ground Zero.

His dad traveled to DC to fight for federal aid for 9/11 victims but now junior will call on Congress to replenish the fund his family is counting on to compensate for his dad’s death.

“Now it’s our time to ask,” Tilearcio said.

Also traveling to DC is Bridget Gormley, 28, whose dad, Billy, 53, got sick with cancer suddenly in 2016 and died about six months later.

Her family filed a claim with the September 11th Victim Compensation Fund and were shocked to learn earlier this month that the death of her firefighter dad will now be compensated at a deeply discounted rate because the fund is running of money.

“It’s a slap in the face,” said Gormley.

9/11 victims waived their right to sue in exchange for filing a claim with the victims fund that awarded money to first responders and others who got sick or died from the terrorist attack and subsequent air-quality related illnesses.

Congress reauthorized the fund under the 2015 James Zadroga 9/11 act through Dec. 18, 2020.

But Rupa Bhattacharyya, the fund’s special master, announced Feb. 15 that the fund has already awarded nearly $5 billion of its $7.375 billion funding limit and can’t fully compensate the record-number of claims coming in.

Pending awards will be reduced by 50 percent and any claims filed after Feb. 2 will be reduced by 70 percent.

“That’s a moral injustice,” said Michael Barasch, a Manhattan attorney who represents about 14,000 9/11 families — half of whom have pending claims that would be affected by the changes.

Tilearcio and Gormley both work for Barasch doing 9/11 community affairs outreach.

The average award for someone who is suffering from a 9/11 related cancer was about $250,000.

If the victim died, the spouse would typically be entitled to an additional $350,000, Barasch said.

On Monday, a bipartisan group of lawmakers, including Democratic Sen. Kirsten Gillibrand, Republican Rep. Peter King and Colorado Republican Sen. Cory Gardner, will introduce legislation to replenish the fund.

They’ll be joined by comedian Jon Stewart, first responders and other advocates.

Jessica Wisniewski was about to turn 6 when terrorists’ planes crashed into the World Trade Center, killing her father who worked at Sandler O’Neill & Partners in the second tower.

Her mother, Kathleen, spent a week at Ground Zero posting a picture of her husband Alan and seeking information about his whereabouts.

That exposure to the debris was later linked to her breast cancer, her daughter said.

Her mother’s claim is pending and now would be subject to at least a 50 percent reduction.

“It’s just so cruel to set an arbitrary date,” Jessica Wisniewski, 24, said. “People can’t help when they get sick or when they file a claim.”