The latest exchange is not only about military rhetoric. It puts a vital shipping route, regional infrastructure and already volatile energy markets at the center of the U.S.-Iran confrontation.
Iran warned of severe, “earthquake-like” retaliation after Donald Trump threatened action against Iran, escalating tensions between Iran and the United States around the Strait of Hormuz. The confrontation matters now because Trump’s threats included potential strikes on Iranian infrastructure, while Iranian officials have linked their response to the security of a waterway central to global oil shipments.
President Donald Trump has threatened to target Iranian power plants and bridges if attacks on shipping in the Strait of Hormuz continue. He said potential targets could include facilities in or next to Tehran. Iran responded with a warning of severe, “earthquake-like” retaliation, escalating the confrontation between Trump and Iran.
The dispute now centers on more than military rhetoric. Trump’s threat links possible strikes on critical Iranian infrastructure to attacks on a vital waterway for global oil shipments, while Tehran’s response raises the prospect of broader regional consequences. The warning comes amid continued U.S. strikes and reports of Iranian retaliatory activity across the region. The central question is whether the threats are intended to deter further attacks, force negotiations or signal a more dangerous phase.
His stated threshold was broad: an attack on shipping carried out by missile, rocket, drone or another weapon. That framing places commercial shipping at the center of the U.S. response rather than treating it as a separate consequence of the conflict.
The threat followed 11 consecutive nights of U.S. strikes on Iran, the BBC reported. Trump also said the U.S. could target an underground nuclear site near Natanz, described as a complex known as Pickaxe Mountain.
Iran ties security to Hormuz
Iranian officials have answered U.S. threats with warnings of reprisals. Mohammad Bagher Ghalibaf, identified by the BBC as Iran’s top negotiator, wrote that the equation of the war was “either all or none.”
In that statement, Ghalibaf said that if Iran could not sell oil in the region, no one would sell oil. He also said that if Iran’s security was not ensured, no infrastructure would be safe, and argued that the strait’s security depended on the absence of American forces.
That is the practical significance behind Iran’s severe-retaliation language. Tehran is signaling that attacks on Iranian territory or its ability to export oil could bring pressure on the transport routes and facilities used by other countries.
Iranian state media also reported air-defense activity in Tehran, while explosions were reported in Tabriz, Chabahar, Konarak and Bushehr. Bushehr is home to Iran’s only nuclear power plant, making any threat involving energy infrastructure especially sensitive.
Shipping routes raise global stakes
The Strait of Hormuz is one of the world’s most consequential maritime chokepoints. Disruption there can affect oil and gas flows well beyond the Middle East, which is why attacks, threats or effective closures rapidly draw attention from governments and markets.
The BBC reported that oil prices rose to $94 on Wednesday after the latest escalation. That does not mean every diplomatic threat will translate into a sustained price increase, but it shows how quickly traders can react when risks to supply routes intensify.
The pressure is not confined to Hormuz. A Houthi media official said the group was closing the Bab al-Mandab Strait, at the southern entrance to the Red Sea, to Saudi vessels. The Houthis are backed by Iran, though Iran’s degree of control over their decisions has long been a point of dispute.
British maritime risk-management group Vanguard said two tankers that had loaded Saudi crude at Yanbu and were bound for China and India made U-turns after the Houthi announcement. The episode illustrates how threats alone can alter shipping decisions before any confirmed strike occurs.
Diplomacy remains publicly on offer
Secretary of State Marco Rubio said the United States remained open to diplomacy, while also saying Iran did not appear serious about talks. That leaves Washington presenting military deterrence and negotiations as parallel options rather than mutually exclusive paths.
Iran and the United States signed a memorandum of understanding in June that was meant to halt military operations, reopen the Strait of Hormuz and produce a broader agreement within 60 days, according to the BBC. The arrangement did not hold.
Three weeks after it was signed, Trump declared the ceasefire over following Iranian attacks on ships in Hormuz and subsequent U.S. strikes, the report said. The breakdown highlights the central problem facing any renewed talks: each side appears to view security in the waterway through sharply different terms.
The U.S. position is that shipping must be protected from attack. Iran’s rhetoric, by contrast, suggests it sees American military presence and strikes as part of the threat to regional security. Those positions are difficult to reconcile without a clearer understanding of what each side would accept as de-escalation.
The cost of escalation is growing
U.S. Defense Secretary Pete Hegseth said the Iran war had cost the United States about $37.5 billion so far, an increase of nearly $8 billion since the prior estimate in May. He told the Senate Appropriations Committee that military training would need to be curtailed without an urgent funding increase.
The House of Representatives approved a $95 billion package that would mostly fund the Iran war and also included a Trump-backed voting-regulations measure. The package passed with Republican support only and faces a difficult path in the closely divided Senate, according to the BBC.
The human cost is also rising. Trump attended a dignified transfer ceremony in Dover, Delaware, for U.S. service members recently killed in the Middle East. The Pentagon identified Sgt. Angel S. Rampersad, 28, as believed to have died after an Iranian strike in Jordan alongside two others.
What to watch from here
The immediate test is whether threats against ships, power plants, bridges and nuclear-related sites become action. Any confirmed attack on commercial shipping in Hormuz could trigger the U.S. response Trump outlined, while further strikes inside Iran could increase pressure on Tehran to retaliate.
Another unanswered question is whether regional actors can avoid being pulled further in. Kuwait said its air defenses engaged Iranian drone attacks, while Bahrain and Jordan reported intercepting drones and missiles, the BBC said.
For now, the rhetoric itself is part of the conflict. Iran’s warning of severe retaliation and Trump’s threats against infrastructure are designed to shape the other side’s choices, but they also make miscalculation more likely in a region where shipping routes, energy supplies and military targets are tightly connected.

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