Happening now breaking news, quote, a whole civilization will die tonight never to be brought back again.

President Trump's drastic and frankly alarming new threat ahead of tonight's deadline to Iran.

We're live at the White House with the latest reporting.

Also, Key Island attacked. The U.S. strikes military targets on Iran's strategic Karg Island.

The new CNN reporting from the region coming up.

Welcome to our viewers here in the United States and around the world.

I'm Wolf Blitzer with Pamela Brown, and you're in the situation room.

Thank you. I'm Wolf Blitzer with Pamela Brown, and you're in the Situation Room.

This is CNN breaking news. This morning, President Trump issues a brand new apocalyptic threat to Iran.

He demands it reopen the Strait of Hormuz within hours

or face annihilation. His grim, dramatic words, and I'm quoting now, a whole civilization

will die tonight, never to be brought back again, end quote. This morning, there have been

U.S. airstrikes on Karg Island, though through which almost all of Iran's oil exports travel.

A U.S. official insists to CNN that only Iranian military sites will be targeted.

And the president has specifically threatened Iran's infrastructure.

This is last week's U.S. strike on a major bridge near Tehran and this morning, Israel's

military is asking Iranians to avoid all train travel and stay away from rail lines.

The president is also threatening to strike Iran's power plants, and today one Iranian minister is asking for civilians to form a human chain around them.

Several countries have privately reached out to the Trump administration

to warn against attacking civilian targets.

And Iran's president shows no signs of backing down on social media.

He posted, quote,

...