Deluged with about 15,000 desperate migrants, Croatia on Friday closed all but one of its border crossings with Serbia to prevent the country from becoming a “migrant hot spot.”

“We cannot register and accommodate these people any longer,” Prime Minister Zoran Milanovic said. “They will get food, water and medical help — and then they can move on.”

The refugees have been streaming into Croatia since Hungarian riot cops blasted pepper spray and tear gas at them this week at the closed Roszke border, drawing international condemnation.

“The European Union must know that Croatia will not become a migrant hot spot. We have hearts, but we also have heads,” Milanovic said, Reuters reported.

The human toll of the migration was evident when Afghan refugee Mohammed Jaffa, 60, suffered a heart attack while trapped in Tovarnik, a Croatian town near the Serbian border where about 3,000 asylum-seekers waited in the stifling heat.

With cops standing by idly, journalists rushed to perform CPR on the man as his wife wailed at his side. He survived.

“The police beat him, they punched him in the chest. They are animals,” his nephew Hassan told The Mirror. “We shouted to the police he was feeling faint because of the heat. He was struggling to breathe, but they pushed him back.”

Croatia at first put out the welcome mat for the masses, but Milanovic changed his stance Friday and said he called for a session of the National Security Council to tackle the crisis.

“We are so exhausted,” Hikmat, 32, a Syrian woman told Reuters. “I just want to get anywhere where we will be safe.”

The EU has been scrambling to respond to the worst refugee crisis since World War II — as almost 475,000 people have swarmed into Europe from war-torn countries so far this year, the International Organization for Migration said.

Many take risky boat rides from the Turkish mainland to the Greek Isles.