Trump gives Iran 48-hour ultimatum to reopen Strait of Hormuz or face strikes on power plants

"If Iran doesn't FULLY OPEN, WITHOUT THREAT, the Strait of Hormuz, within 48 HOURS from this exact point in time, the United States of America will hit and obliterate their various POWER PLANTS, STARTING WITH THE BIGGEST ONE FIRST!" Trump said in a post on Truth Social.

The president's threat represents a notable escalation in rhetoric as tensions surge over the strategically vital waterway.

"It's relatively safe, but you need a lot of help in the sense of you need ships, you need volume," he said.

The president added that NATO hasn't had the "courage" to assist the U.S. with reopening the waterway.

"NATO could help us, but they so far haven't had the courage to do so, and others could help us," Trump said. "But, you know, we don't use it. You know, at a certain point, it'll reopen itself."

Earlier Friday, Trump ripped NATO on Truth Social as "cowards," saying they "complain about the high oil prices they are forced to pay, but don't want to help open the Strait of Hormuz."

A growing group of countries has signed onto a joint statement signaling their "readiness to contribute to appropriate efforts to ensure safe passage" through the strait.

The joint statement said, "We express our readiness to contribute to appropriate efforts to ensure safe passage through the Strait," and, "We welcome the commitment of nations who are engaging in preparatory planning."

The statement was attributed to leaders from more than 20 countries, including the United Kingdom, France, Germany, Italy, Japan, Canada and the United Arab Emirates.

"We express our deep concern about the escalating conflict. We call on Iran to cease immediately its threats, laying of mines, drone and missile attacks and other attempts to block the Strait to commercial shipping, and to comply with UN Security Council Resolution 2817," the statement continued.

Fox News Digital's Greg Norman-Diamond contributed to this report.