Iran vows Hormuz closure if US strikes power grid as Trump's 48-hour ultimatum expires

The clock was running down on Sunday as the Trump administration's ultimatum to Iran entered its final hours. The president had issued a stark demand on Truth Social: open the Strait of Hormuz completely and without threat within 48 hours, or face American strikes on Iranian power plants, starting with the largest. The deadline was set to expire on Monday, and there was no indication Iran intended to comply.

Instead, Iran's military leadership doubled down. The Islamic Revolutionary Guard Corps issued a statement with a threat of its own: if the United States struck Iran's power grid, the Strait of Hormuz would be completely closed and would remain sealed until Iran's destroyed power plants were rebuilt. The statement was unambiguous. Ebrahim Zolfaqari, an Iranian military spokesman, elaborated on the scope of retaliation. If Iran's fuel and energy infrastructure came under attack, he said, all energy infrastructure belonging to the US and allied regimes in the region would be targeted, along with information technology systems and water desalination facilities.

The threat carried real weight because of the region's dependence on electricity-powered desalination. Bahrain and Qatar rely almost entirely on desalinated water for drinking supplies. The UAE and Saudi Arabia depend on it for the majority of their freshwater. Any disruption to power grids would cascade into a humanitarian crisis within days. The IRGC's warning effectively placed Saudi Arabia, Qatar, the UAE, Bahrain, and Kuwait in direct jeopardy, each nation vulnerable to the same infrastructure attacks Iran was threatening.

The escalation was not hypothetical. By Sunday morning, air raid sirens had sounded across Israel as Iranian missiles struck multiple targets. Injuries were reported in Arad and Dimona. Israel confirmed it had launched retaliatory strikes on Tehran. The conflict, now in its fourth week, had already expanded beyond the original Israeli-Iranian confrontation. Iran had fired long-range ballistic missiles at a US-British base in the Indian Ocean. It had struck near Israel's nuclear facility at Dimona, a demonstration of reach and precision that underscored how far the fighting had spread.

On a separate front, the war between Israel and Hezbollah had intensified sharply. Israeli forces continued operations in southern Lebanon while Hezbollah launched repeated rocket attacks into northern Israel. The casualty toll had climbed to more than 1,000 dead in Lebanon since early March alone. The human cost was mounting across multiple theaters simultaneously.

The economic consequences were already visible. Oil markets had surged on the uncertainty. Shipping routes through the Strait of Hormuz, one of the world's most critical chokepoints for energy transport, remained disrupted. Analysts were warning of severe global market disruption if the military escalation continued past the deadline. Tony Sycamore, an analyst at IG Markets, described Trump's threat as having placed a 48-hour ticking time bomb of elevated uncertainty over financial markets. The world was watching a countdown that no one seemed able to stop, with the potential to reshape energy prices and supply chains globally if either side followed through on its threats.