UN warns of mass starvation as Iran blocks fertilizer through Hormuz strait

Potential starvation of 45 million additional people globally if fertilizer shipments remain blocked; 2,869 killed in Lebanon, 1+ million displaced.
We have a few weeks to prevent a massive humanitarian crisis
A UN task force leader warns that fertilizer blockade could push 45 million into starvation if not resolved immediately.

At the intersection of geopolitics and hunger, the closure of the Strait of Hormuz has placed the world's most vulnerable populations on the edge of catastrophe. One-third of the global fertilizer supply — the invisible foundation beneath the food that sustains billions — can no longer reach the farmers who need it, because a conflict between the United States and Iran has turned a narrow waterway into a chokepoint of civilizational consequence. The UN warns that without resolution within weeks, 45 million additional people could be pushed into starvation — not by nature's indifference, but by human choices made in capitals far from the fields that will go unplanted. History has long known that wars are fought with weapons but won or lost on harvests.

  • A UN task force leader warns the world has only weeks to act before a fertilizer shortage triggers a food collapse affecting tens of millions of people across the globe.
  • Iran's closure of the Strait of Hormuz — through which a third of the world's fertilizers normally flow — is already disrupting supply chains critical to the coming growing season.
  • President Trump rejected Iran's latest peace proposal as 'a piece of garbage,' declared the ceasefire on 'massive life support,' and convened his national security team to weigh renewed military strikes.
  • Diplomatic channels remain open but perilous: Turkey, Qatar, the UK, and France are scrambling to broker a resolution even as Iran threatened to strike British and French warships entering the strait.
  • Oil markets are reacting in real time — Brent crude spiked 4 percent to $105.50 a barrel on news of Trump's rejection — signaling how tightly the global economy is wound around this single waterway.
  • An expected meeting between Trump and Xi Jinping offers a fragile thread of hope, as Iran has already expressed openness to a Chinese-proposed four-point plan for the Gulf.

The world is running out of time. Within weeks, according to the head of a UN task force, the global food system could fracture in ways that push tens of millions into hunger — not because of drought or disease, but because Iran has closed the Strait of Hormuz, the narrow passage through which roughly one-third of the world's fertilizer normally flows. Without those nutrients reaching farmers in time for the growing season, an additional 45 million people could face starvation. The World Trade Organisation has identified fertilizers as the single most urgent concern in global commerce.

The closure is the direct consequence of escalating US-Iran tensions. President Trump this week rejected Iran's latest proposal to end the conflict, calling it a piece of garbage he hadn't bothered to finish reading, and described the existing ceasefire as being on life support with almost no chance of survival. Even as he left the door open to diplomacy, his national security team was meeting to discuss the possibility of renewed military strikes against Iran.

The broader conflict has already exacted a devastating toll. Israeli military operations in Lebanon have killed at least 2,869 people — including over 100 medical workers — and displaced more than a million. In Gaza, the war continues, with Israeli lawmakers approving a tribunal empowered to impose the death penalty on Palestinians convicted in connection with the October 2023 Hamas attack — the first such application of capital punishment in Israel since the execution of Adolf Eichmann in 1962.

The regional war has drawn in unexpected actors. The UAE, long seen as a potential mediator, has been secretly conducting strikes against Iran, including one that knocked a refinery on Lavan Island offline for months. Iran responded with missiles and drones; the UAE has absorbed more than 2,800 of them — more than any other country.

Diplomatic efforts persist but remain fragile. Turkey's foreign minister traveled to Qatar for talks on restoring navigational safety, while the UK and France announced a meeting of 40 defense ministers to discuss reopening the strait — just one day after Iran threatened to strike their warships if they tried. A scheduled meeting between Trump and Xi Jinping offers perhaps the most consequential opening, as Iran has signaled willingness to support a Chinese-proposed framework for the Gulf.

The fertilizer sits in warehouses and on ships. The farmers are waiting. The growing season will not wait indefinitely, and what is decided in the coming weeks will determine whether this crisis becomes a famine of historic proportions.

The world is running out of time. In the span of a few weeks, according to the head of a UN task force coordinating the response to an unfolding humanitarian catastrophe, the global food system could collapse in ways that would push tens of millions of people into hunger and starvation. The culprit is not drought or disease but geopolitics: Iran has effectively closed the Strait of Hormuz, the narrow waterway between Iran and Oman through which roughly one-third of the world's fertilizer normally flows. Without those nutrients, crops cannot grow. Without crops, people starve.

Jorge Moreira da Silva, executive director of the UN Office for Project Services and leader of the task force, put the stakes plainly: "We have a few weeks ahead of us to prevent what will likely be a massive humanitarian crisis." The World Trade Organisation has identified fertilizers as the single most pressing concern in global commerce right now. The numbers are staggering. If the blockade holds and fertilizer cannot reach farmers in time for the growing season, an additional 45 million people could be forced into hunger.

The closure of the strait is the direct result of escalating tensions between the United States and Iran. On Monday, President Donald Trump rejected Iran's latest proposal to end the conflict, calling it a "stupid proposal" and "a piece of garbage" that he hadn't bothered to finish reading. He described the existing ceasefire as being "on massive life support," using the metaphor of a patient with a 1 percent chance of survival. Trump said he still believed a diplomatic solution was possible, but his national security team was simultaneously meeting to discuss the possibility of resuming military action against Iran to increase pressure on the regime.

The blockade is just one consequence of a conflict that has already exacted a devastating human toll. In Lebanon alone, Israeli military operations that began on March 2 have killed at least 2,869 people, including more than 100 medical workers. More than a million people have been displaced from their homes. In Gaza, the war that triggered this entire cascade of violence continues. Israeli lawmakers approved a bill on Monday establishing a special tribunal with the authority to impose the death penalty on Palestinians convicted of participating in the October 2023 Hamas attack that started the war—the first time capital punishment could be applied in Israel since the execution of Nazi war criminal Adolf Eichmann in 1962.

The regional conflict has drawn in unexpected players. The United Arab Emirates, long seen as a potential mediator, has been secretly conducting military strikes against Iran, according to reporting by the Wall Street Journal. One such strike hit a refinery on Iran's Lavan Island in early April, causing a large fire and knocking much of its capacity offline for months. Iran responded with a barrage of missiles and drones. The UAE has absorbed more than 2,800 Iranian drones and missiles—far more than any other country, including Israel.

Diplomatic efforts continue, though they appear fragile. Turkey's foreign minister was scheduled to visit Qatar to discuss efforts to restore navigational safety in the strait. The UK and France announced plans to host a multinational meeting of 40 defense ministers on Tuesday to discuss reopening the waterway—a move that came just one day after Iran threatened to strike British and French warships if they attempted to help. Iran's parliamentary speaker, Mohammad Bagher Ghalibaf, said the country's armed forces were ready to deliver a "well-deserved response to any aggression" and that adversaries "will be surprised."

Trump is scheduled to meet with Chinese leader Xi Jinping this week, and analysts expect him to press for Chinese help in resolving the standoff. Iran has already signaled willingness to support a four-point plan for the Gulf region proposed by Xi. Oil markets have reacted sharply to the uncertainty. When Trump rejected Iran's proposal, Brent crude spiked as much as 4 percent to $105.50 a barrel before easing slightly. The price of oil remains acutely sensitive to any news about whether the strait will reopen.

What happens in the coming weeks will determine whether the world's poorest and most vulnerable populations face a food crisis of historic proportions. The fertilizer is sitting in warehouses and on ships, waiting. The farmers are waiting. The crops are waiting. And the clock is running.

We have a few weeks ahead of us to prevent what will likely be a massive humanitarian crisis.
— Jorge Moreira da Silva, UN task force leader
The ceasefire is on massive life support, where the doctor walks in and says your loved one has approximately a 1% chance of living.
— Donald Trump
The Hearth Conversation Another angle on the story
Inventor

Why does fertilizer matter so much right now? Isn't this just a trade issue?

Model

It's a trade issue that becomes a hunger issue within weeks. One-third of global fertilizer moves through that strait. If farmers can't plant in time for the growing season, there's no harvest. No harvest means no food.

Inventor

But surely there are other routes, other sources?

Model

Not at the scale or speed needed. Rerouting around Africa adds months and cost. And this isn't a normal supply chain problem—it's a deliberate blockade tied to a war that's already killed thousands and displaced over a million people.

Inventor

How did we get here? This seems like it escalated very quickly.

Model

The conflict between the US and Iran has been simmering for years, but it accelerated dramatically. Now you have the UAE secretly striking Iranian refineries, Iran threatening to hit Western warships, and Trump saying the ceasefire is essentially dead. Each side is hardening its position.

Inventor

Is there any chance of a diplomatic breakthrough?

Model

Trump says he still thinks it's possible, but his own national security team is meeting to discuss resuming military action. That's not the posture of someone genuinely trying to negotiate. And Iran's response to the US proposal was a flat rejection.

Inventor

What's the human cost if this doesn't get resolved?

Model

Forty-five million additional people pushed into hunger and starvation. That's on top of the 2,869 already dead in Lebanon, the million-plus displaced, the death penalty tribunal Israel just approved. This isn't abstract anymore.

Inventor

So what happens next?

Model

Trump meets Xi Jinping this week. The UK and France are hosting defense ministers to discuss reopening the strait. But Iran just threatened to strike their warships if they try. We're in a window of days or weeks before the planting season closes and the crisis becomes irreversible.

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