Trump warns 'whole civilisation will die' in Iran if ultimatum expires

US President Donald Trump warned that "a whole civilization will die" in Iran on Tuesday (April 7, 2026) if the country does not heed his ultimatum to accept U.S. war demands.

"A whole civilization will die tonight, never to be brought back again. I don't want that to happen, but it probably will," Mr. Trump wrote on his Truth Social platform. "WHO KNOWS?"

Mr. Trump did not give details but has already said the U.S. military could bomb Iran's bridges, power plants and other civilian infrastructure into the "stone age."

Trump, however, said that Tehran still has time to capitulate ahead of the deadline set for 8pm ET (Wednesday, 5:30am IST) in Washington.

The US president further added, “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!”

Trump issued the warning about 12 hours ahead of the deadline for Iran to agree to a ceasefire proposal and reopen the Strait of Hormuz.

The US president has extended previous deadlines several times but suggested that the Tuesday ultimatum set by the Washington is final, as the rhetoric on both sides reached a new high, leaving Iranians on edge.