The U.S.–Iran conflict has been simmering around energy markets for months, but Wednesday’s events change the mechanism of risk. The United States says it sank five Iranian oil tankers after missile attacks on a U.S. Navy vessel. Iran then targeted ten ships around the Strait of Hormuz and launched ballistic missiles at a U.S. military base in Jordan. Reuters↗ called it the biggest wave of attacks on shipping since the war began.

That distinction matters. Oil can exist in storage tanks and export terminals, but it only reaches the world economy if ships can safely move it. Before the war, the Strait of Hormuz carried roughly one-fifth of global oil. Iran has now effectively curtailed transit, and the threat is no longer confined to a hypothetical blockade or isolated strike.

Brent crude pushed above $100 a barrel, while U.S. diesel hit a record $5.94 a gallon. Diesel is the more important household-and-business number than it first appears: trucking, construction, agriculture and delivery networks all consume it, so a prolonged diesel shock can spread into the price of physical goods even if your own car burns gasoline.

The second-order problem is monetary policy. The Federal Reserve is already debating whether inflation is sticky enough to justify another rate increase. A durable energy shock can raise headline inflation directly and then work through freight and production costs. That does not guarantee a rate hike, but it removes one of the easiest paths toward lower borrowing costs.

There is also a second theater now feeding the same energy complex. Iran-aligned Houthi forces have intensified attacks on Saudi targets, including energy infrastructure, while Saudi Arabia has responded in Yemen. That means the Gulf and Red Sea risks are reinforcing one another rather than occurring independently.

For D-space, the useful dashboard is simple: watch whether commercial transits through Hormuz normalize, whether Brent stays above $100 rather than briefly touching it, and whether diesel remains near record levels. Those three signals tell you whether this remains a frightening headline or becomes a persistent cost shock for households and companies.

Wake Up covered the renewed U.S.–Iran exchange on September 2. Today’s story is included only because the conflict has materially escalated from strikes around the Strait into sustained attacks on shipping itself — exactly the kind of change the seven-day anti-repetition rule is meant to permit.