U.S. President Donald Trump has warned that Iran faces devastating consequences if it fails to reach an urgent deal before a U.S.-imposed deadline, declaring that the country’s “whole civilization will die” without decisive action.

The warning came amid rising tensions over the Strait of Hormuz, with Trump demanding that Iran fully reopen the key shipping route. He set a deadline of Tuesday evening (U.S. time), cautioning that failure to comply could result in severe military consequences.

In a post on his Truth Social platform, Trump suggested that the situation could mark a turning point in global history, while also hinting at the possibility of regime change in Iran. He described the moment as critical, saying the outcome could reshape the country’s future.

The situation has already escalated, with reported strikes on Iranian infrastructure, including bridges and rail systems. Iranian state media confirmed casualties following an attack in Kashan, while warnings were issued for civilians to avoid transport networks due to security concerns.

Iran, however, has rejected calls for a ceasefire, insisting instead on a permanent end to hostilities. The standoff continues to heighten global tensions, with the Strait of Hormuz remaining a focal point due to its importance to international oil shipments.