President Donald Trump warned that devastating consequences could unfold within hours if Iran fails to agree to his terms for ending the war, declaring that an entire civilization could be wiped out.

In a post on Truth Social, Trump wrote: “A whole civilization will die tonight, never to be brought back again,” adding, “I don’t want that to happen, but it probably will.”

He also suggested that recent developments could lead to a dramatic shift, writing: “However, now that we have Complete and Total Regime Change, where different, smarter, and less radicalized minds prevail, maybe something revolutionarily wonderful can happen, WHO KNOWS? We will find out tonight, one of the most important moments in the long and complex history of the World. 47 years of extortion, corruption, and death, will finally end. God Bless the Great People of Iran!”

In remarks delivered the previous day, Trump reaffirmed that the deadline for reaching an agreement with Iran remains set for Tuesday and issued additional warnings directed at Tehran.

“The entire country [of Iran] can be taken out in one night, and that night might be tomorrow night” Trump said.

His comments followed Iran’s rejection of a proposed temporary ceasefire. Tehran conditioned any end to the conflict on several demands, including halting regional hostilities, establishing safe passage through the Strait of Hormuz, rebuilding damaged infrastructure, and lifting all sanctions.

Trump indicated that negotiations were still ongoing but insufficient, stating: “Tuesday is the deadline. The Iranians have made an offer, a significant offer, a significant step. It’s not enough, but a very significant step. They are negotiating now and they have made a very significant step.”

After the speech, Iranian officials dismissed Trump’s statements as unrealistic. Iran’s Armed Forces Central Headquarters said: “The rude, insolent, and baseless threats of the delusional US President will not make up for the humiliation and disgrace of the United States in the West Asia region.”