US-Iran Crisis: Trump Warns Tehran Over Hormuz Blockade

US-Iran tensions escalated Monday after Tehran rejected a US demand to reopen the Strait of Hormuz as a deadline set by President Donald Trump ran out. The 10-day ultimatum, issued on March 26, expired Monday evening, according to the timeline described. Iranian leaders said the waterway would not fully reopen until Iran receives compensation for damages tied to the ongoing conflict.

Washington’s public messaging hardened following Iran’s refusal. In social media posts, Trump threatened to bring “Hell” to Iran, and he told Axios he was prepared to be “blowing up everything over there” if Tehran does not agree to a deal. He also announced a news conference scheduled for 1 p.m. Monday and referenced a separate, unspecified deadline for 8 p.m. on Tuesday.

The president’s threats included civilian infrastructure , explicitly naming Iran’s civilian power plants as potential targets. The source material notes that striking such facilities could be considered a war crime under international law. The combination of an expired ultimatum and threats against civilian targets contributed to a heightened state of alert around the Gulf, as described.

Military developments added to the standoff after a recent incident in which an American fighter jet was shot down by Iranian forces. US forces then carried out a rescue operation to retrieve an American airman more than 24 hours after the shootdown. The episode marked direct military engagement in the region alongside the diplomatic and rhetorical escalation.

Iran has also continued asymmetric attacks against energy infrastructure belonging to US allies in the Gulf, according to the account. Recent targets included the oil headquarters in neighboring Kuwait, underscoring Tehran’s stated willingness to disrupt regional stability. These actions, paired with the Hormuz dispute, placed energy security and shipping concerns at the center of the crisis.

What remains unclear is the next step from either side as the international community watches for signals around the newly referenced Tuesday 8 p.m. timing. The source describes growing concern that the confrontation could widen, with the region on high alert. For global markets, the Strait of Hormuz’s status and the security of Gulf energy infrastructure are being closely monitored because of their central role in international energy flows and broader risk sentiment.