48-Hour Update: Treasury Secretary Bessent Issues Direct Warning to Omani Ambassador; Iran’s Tolling Authority Sanctioned as US-Iran Ceasefire Violations Reported
Published: May 29, 2026
By: Zeeshan Khan
Reading time: 16 minutes
Category: Global Economy / Food Security / Energy
Note: May 29, 2026 – This is an update to the May 27, 2026 article: The Compound Shock Deepens: FAO Director-General Warns of “Systemic Shock” as Somalia Faces First Famine Risk Since 2022 – Fertilizer Crisis Confirmed as Primary Transmission Mechanism
WASHINGTON / ROME / JAKARTA – May 29, 2026 – Two days after the FAO Director-General declared a “systemic shock” to the global agrifood system, the United States has dramatically escalated its diplomatic posture over the Strait of Hormuz. On May 28, 2026, U.S. Treasury Secretary Scott Bessent issued a public warning that the United States would sanction Oman if it participated in a proposed tolling system for the strategic waterway. Bessent spoke directly with the Omani ambassador and received assurances that there were “no plans for tolling.”
This 48-hour update covers the U.S. Treasury’s sanctions threat against Oman, the formal sanctioning of Iran’s “Persian Gulf Strait Authority,” the reported US-Iran ceasefire violations on May 28, the confirmatory international reporting on the FAO’s “systemic shock” warning, the worsening humanitarian emergencies in Somalia and South Sudan (now confirmed as “present emergencies” by Action Against Hunger and the FAO), the unchanged USDA corn production forecast, and the continued absence of diplomatic resolution in the Strait of Hormuz.
The Essentials: Who, What, When, Where, Why, How (Last 48 Hours – Confirmed)
Who: U.S. Treasury Secretary Scott Bessent; the Omani ambassador to the United States; President Donald Trump; Iran’s “Persian Gulf Strait Authority”; the UN Food and Agriculture Organization (FAO); Action Against Hunger; the World Food Programme (WFP); the governments of Somalia and South Sudan; and the people of Burhakaba district in Somalia’s Bay region.
What: Six major developments since May 27, 2026:
- U.S. Treasury Secretary Bessent threatened sanctions on Oman if it participated in Strait of Hormuz tolling; spoke directly with Omani ambassador
- Omani ambassador assured the U.S. that there were “no plans for tolling” the waterway
- U.S. Treasury sanctioned Iran’s “Persian Gulf Strait Authority” — Tehran’s new agency that collects fees for transiting the strait
- U.S. extended sanctions threat to any party paying these fees, warning that such parties “may be providing support to and receiving services from” Iran’s Revolutionary Guards
- United States and Iran accused each other of violating an ongoing truce following an exchange of fire on May 28 — the most serious salvos since April ceasefire agreement
- International media confirmed and amplified FAO “systemic shock” warning; Spanish Prime Minister Pedro Sánchez issued parallel warning
When:
- May 28, 2026 – Treasury Secretary Bessent issues public warning; speaks with Omani ambassador
- May 28, 2026 – U.S. sanctions Iran’s “Persian Gulf Strait Authority”
- May 28, 2026 – US and Iran accuse each other of ceasefire violations
- May 27, 2026 – President Trump appears to threaten Oman (would “blow them up” if involved in Hormuz control)
- May 26, 2026 – FAO Director-General warns of “systemic shock” (previously reported)
- May 25-26, 2026 – Action Against Hunger confirms “present emergency” in Somalia
Where: United States Treasury Department (Washington, D.C.); Oman (Muscat); Iran; Strait of Hormuz; FAO (Rome); Somalia (Bay region — Burhakaba district at highest risk, 37.1% Global Acute Malnutrition rate); South Sudan (Jonglei State and Upper Nile State — IPC Phase 5 Catastrophe confirmed in multiple counties).
Why (Immediate Cause): The Iranian proposal would allow a tolling system for the Strait of Hormuz as part of a potential agreement with Washington. The U.S. Treasury has determined that formalizing fees for transiting the strategic waterway is unacceptable. The sanctions threat against Oman represents an escalation of U.S. efforts to prevent any country from legitimizing or facilitating the Iranian tolling authority. The underlying compound shock — driven by fertilizer supply disruptions (30% of urea, 44% of sulphur transit Hormuz) and El Niño (82% emergence probability) — continues to drive active humanitarian emergencies in Somalia and South Sudan.
How (Mechanism): The Treasury Department has sanctioned Iran’s “Persian Gulf Strait Authority” and extended the threat of sanctions to anyone paying these fees, warning that such parties risk being targeted for providing support to Iran’s Revolutionary Guards. The diplomatic situation has become more volatile, with both the U.S. and Iran accusing each other of ceasefire violations on May 28. The humanitarian emergencies have been confirmed as “present emergencies”: in Burhakaba, Somalia, the Global Acute Malnutrition (GAM) rate has reached 37.1% — IPC Phase 5 (extremely critical). In South Sudan, populations in Akobo, Fangak, Nyirol, Uror, Luakpiny/Nasir, and Ulang counties are in Catastrophe (IPC Phase 5). The USDA has confirmed US corn production is forecast at 16 billion bushels, a decline of 1 billion bushels (6% below the 2025-26 record), though this would still be the second largest on record.
Specific Updates in the Last 48 Hours (May 27–29, 2026)
1. U.S. Threatens Sanctions on Oman Over Strait of Hormuz Tolling (May 28)
On May 28, 2026, U.S. Treasury Secretary Scott Bessent issued a public warning that the United States would sanction Oman if it participated in a proposed tolling system for the Strait of Hormuz.
Treasury Secretary Bessent’s Statement (via X/Twitter):
“Oman, in particular, should know that the US Treasury will aggressively target any actors involved — directly or indirectly — in facilitating tolls for the Strait and any willing partners will be penalized.”
Private Diplomatic Engagement: Bessent later told a White House press briefing that he spoke directly with the Omani ambassador on May 28 and received assurances that there were “no plans for tolling” the critical waterway.
What Bessent Told the Omani Ambassador:
“I told him that this was a non-starter and he did not want to risk either the Oman individuals or Omani financial institutions getting sanctioned.”
Connection to President Trump’s Earlier Statement: On May 27, President Donald Trump appeared to threaten Oman when asked about a possible short-term arrangement allowing Oman and Iran to control Hormuz, saying he would “blow them up” if Muscat did so. The White House did not immediately respond when asked if Trump had misspoken and intended to refer to Iran rather than Oman.
Significance: This is the first direct U.S. threat of secondary sanctions related to the Strait of Hormuz tolling proposals. It suggests that the diplomatic situation remains not only unresolved but actively deteriorating, with new threats being issued.
2. U.S. Sanctions Iran’s “Persian Gulf Strait Authority”; Extends Threat to Fee-Payers
The Treasury Department has already sanctioned Iran’s “Persian Gulf Strait Authority” — Tehran’s new agency that collects fees for transiting the strait. Washington has extended the threat of sanctions to anyone paying these fees.
Sanctions Extension Warning: The U.S. warned that parties paying fees to the Iranian authority “may be providing support to and receiving services from” Iran’s Revolutionary Guards and therefore “may be exposed to sanctions risk.”
What This Means: Any company or country that pays tolls to the Iranian authority risks being sanctioned by the United States. This significantly raises the stakes for any formalization of the tolling system.
3. US and Iran Accuse Each Other of Ceasefire Violations (May 28)
On May 28, the United States and Iran accused each other of violating an ongoing truce following an exchange of fire — the most serious salvos since they agreed to a ceasefire in April.
Current Diplomatic Status: The United States and Iran have been locked in weeks-long indirect talks through mediators. The May 28 exchange of fire represents a significant deterioration in the fragile ceasefire.
Strait of Hormuz Status (Updated May 29):
| Element | Status |
|---|---|
| Strait of Hormuz | Partially blocked; limited controlled passages occurring |
| Iran tolling authority | SANCTIONED by US Treasury (May 28, 2026) |
| US threat to Oman | ISSUED (May 28, 2026) |
| Oman’s position | Assured US “no plans for tolling” |
| US-Iran ceasefire | VIOLATIONS ACCUSED by both sides (May 28, 2026) |
| Diplomatic resolution | NOT ACHIEVED — unchanged; now more volatile |
4. International Media Confirms FAO “Systemic Shock” Warning
Multiple international news outlets have reported on the FAO’s “systemic shock” warning in the last 48 hours, confirming the severity of the assessment.
What the FAO Warned (as reported May 27-28):
- The world is witnessing “not only a geopolitical crisis, it is a systemic shock to the global agrifood system”
- The largest impacts may not be immediate; they could emerge months from now when farmers begin harvesting less
- Severe disruptions in the Strait of Hormuz have already affected the movement of oil, liquefied natural gas, sulfur, and fertilizers — driving up agricultural input costs
- “We have a window to act, but that window is narrowing”
Policy Recommendations Reiterated (as reported):
| Action Required | Rationale |
|---|---|
| Keep trade flowing | Export restrictions on fertilizers and agricultural inputs must be avoided; these measures intensify shortages and hurt poorer import-dependent countries most |
| Smarter agricultural responses | Traditional emergency packages centered exclusively on fertilizer-intensive systems may no longer be viable |
| Targeted support | Resources should focus on the most vulnerable populations through targeted social protection systems |
| Support from international financial institutions | Farmers and import-dependent countries need liquidity support now — before the next agricultural cycle. A delay in financing will result in lost production |
Spanish Prime Minister Pedro Sánchez’s Warning (as reported):
“I believe it is crucial that we be aware of what is at stake, and there is so much of it, because the decisions made today will determine whether, in the next six or twelve months, the world will face a new food crisis.”
5. Somalia Famine Risk Confirmed as “Present Emergency” – GAM Rate 37.1% in Burhakaba
ReliefWeb (UN OCHA) confirmed that Action Against Hunger is warning that the latest IPC analysis reveals rapidly worsening food insecurity in Somalia, including a credible risk of famine in Burhakaba District in Bay Region.
Somalia Crisis Statistics (Confirmed):
| Metric | Figure |
|---|---|
| Population in IPC Phase 3+ (Crisis or worse) | 6 million (nearly one in three) |
| Population in Emergency (IPC Phase 4) | 1.9 million (nearly doubled from Q1 2025) |
| Children under 5 with acute malnutrition (2026 projection) | 1.88 million |
| Children expected to face Severe Acute Malnutrition | Nearly 493,000 |
| GAM rate in Burhakaba District | 37.1% (IPC Phase 5 — extremely critical) |
Action Against Hunger’s Assessment:
“What we are witnessing in Burhakaba and across the Bay region is not a future warning — it is a present emergency.”
Drivers of the Crisis (Confirmed):
- Failing Gu rains
- Soaring food prices exacerbated by Middle East conflict
- Limited humanitarian food security assistance
- Global Acute Malnutrition (GAM) rate of 37.1% in Burhakaba means “in some communities, malnutrition is the norm, not the exception”
6. South Sudan Hunger Crisis Confirmed – IPC Phase 5 in Multiple Counties
FAO’s own emergency portal confirms that populations in Akobo, Fangak, Nyirol and Uror counties in Jonglei State and Luakpiny/Nasir and Ulang counties in Upper Nile State are in Catastrophe (IPC Phase 5).
South Sudan Crisis Statistics (Confirmed by FAO):
| Metric | Figure |
|---|---|
| Population in high acute food insecurity (IPC Phase 3+) | 7.8 million (56% of population) |
| Population facing Catastrophe (IPC Phase 5) | 73,300 |
| Population in Emergency (IPC Phase 4) | 2.5 million |
| Children suffering acute malnutrition | 2.2 million |
| Children projected to face severe acute malnutrition | Nearly 700,000 |
WFP Director of Emergencies Ross Smith:
“Hunger in South Sudan is intensifying, not stabilizing. Between April and July of this year, more than half of the population is projected to face crisis levels of hunger or worse, including people already in catastrophic conditions.”
FAO Director of Emergencies and Resilience Rein Paulsen:
“These gains remain highly vulnerable to conflict, insecurity, and climate shocks—the very forces driving today’s food crisis. We must act urgently and collectively to protect livelihoods, sustain food production, and prevent millions more people from falling deeper into hunger.”
7. USDA Corn Production Forecast: Confirmatory Details
The USDA’s May 2026 Feed Outlook report provides additional context on the corn production decline reported in the May 27 article.
Key USDA Forecast Details (Confirmed):
| Metric | Forecast |
|---|---|
| US corn production (2026-27) | 16 billion bushels |
| Decline from 2025-26 record | 1 billion bushels (6% below) |
| Corn planted acreage | 95.3 million acres (3.5 million less than 2025-26) |
| Harvested acreage | 87.4 million acres (4% decrease) |
| Expected corn yield per acre | 183 bushels (down from 186.5 record) |
| Global coarse grains production | Expected to fall 18 million MT to 1,589 million MT |
Important Context from USDA: Despite the decrease, forecast 2026-27 corn production would be the second largest on record.
8. Fertilizer Crisis and El Niño Status: Unchanged from May 27
The underlying drivers of the compound shock remain unchanged from the May 27 article.
Fertilizer Transmission Mechanism (Unchanged):
- Approximately 30% of global urea trade transits the Strait of Hormuz
- Approximately 44% of global sulphur trade transits the Strait of Hormuz
- Global urea prices rose approximately 26% following the conflict
El Niño Status (Unchanged):
| Element | Status |
|---|---|
| NOAA emergence probability (May-July 2026) | 82% |
| NOAA persistence probability (winter 2026-27) | 96% |
| Probability of “strong” El Niño (≥1.5°C) | Approximately 50% |
| Probability of “super” El Niño (≥2.0°C) | Approximately 25% |
Comparison: Before (May 27 Article) and After (May 29 – Current)
| Issue | As of May 27, 2026 (Article) | As of May 29, 2026 (Current) |
|---|---|---|
| Strait of Hormuz diplomatic resolution | NOT ACHIEVED — unchanged | NOT ACHIEVED — now more volatile; US-Iran ceasefire violations reported |
| US sanctions threat | Not mentioned | ISSUED — Treasury Secretary threatens Oman (May 28) |
| Iran tolling authority | Not mentioned | SANCTIONED by US Treasury (May 28) |
| Oman’s position | Not mentioned | ASSURED US — “no plans for tolling” |
| US-Iran ceasefire status | Not specified | BOTH SIDES ACCUSED EACH OTHER of violations (May 28) |
| FAO “systemic shock” warning | Confirmed | CONFIRMED — multiple international outlets reported May 27-28; Spanish PM warning |
| Somalia famine risk | Confirmed — 6 million in IPC Phase 3+ | CONFIRMED — GAM rate 37.1% in Burhakaba; “present emergency” |
| South Sudan hunger crisis | Confirmed — 7.8 million in IPC Phase 3+ | CONFIRMED — FAO confirms Catastrophe (IPC Phase 5) in multiple counties |
| US corn production | 26 million metric ton decline | CONFIRMED — 1 billion bushel decline (6% below record) |
| El Niño probability | 82% emergence (unchanged) | UNCHANGED |
Timeline of Key Events (Updated Through May 29, 2026)
| Date | Event |
|---|---|
| May 21, 2026 | Strait of Hormuz blockade intensifies |
| May 25, 2026 | April FAO Food Price Index (130.7 points) |
| May 26, 2026 | May FAO Food Price Index (138.2 points, +5.7%); FAO Early Warning issued |
| May 26, 2026 | FAO Director-General warns “systemic shock”; “window to act is narrowing” |
| May 26, 2026 | Somalia famine risk warning (first since 2022) |
| May 26, 2026 | South Sudan hunger crisis: 7.8 million affected; 73,300 in Catastrophe |
| May 26, 2026 | Fertilizer transit data confirmed (30% urea, 44% sulphur) |
| May 26, 2026 | US corn production forecast down 26 MMT |
| May 27, 2026 | President Trump threatens Oman — would “blow them up” if involved in Hormuz control |
| May 28, 2026 | Treasury Secretary Bessent threatens sanctions on Oman; speaks with Omani ambassador |
| May 28, 2026 | US sanctions Iran’s “Persian Gulf Strait Authority”; extends threat to fee-payers |
| May 28, 2026 | US and Iran accuse each other of ceasefire violations — most serious since April |
| May 28-29, 2026 | International media confirms FAO “systemic shock” warning; Spanish PM warning |
| May 28-29, 2026 | Action Against Hunger confirms “present emergency” in Somalia (GAM rate 37.1% in Burhakaba) |
| June 2026 | India’s monsoon planting season begins |
| Q3-Q4 2026 | Full harvest consequences expected to become visible in production data |
Why This Matters (Updated for May 29)
The last 48 hours have fundamentally altered the diplomatic landscape surrounding the Strait of Hormuz while confirming the severity of the humanitarian emergencies.
For the Strait of Hormuz and Global Trade: The United States has now directly threatened sanctions on Oman — a key regional mediator — over tolling proposals. The Iranian tolling authority has been sanctioned, and the U.S. has extended the threat to anyone paying fees. The US-Iran ceasefire is showing signs of strain, with both sides accusing each other of violations. Diplomatic resolution is not only unachieved but now appears more distant. The Strait of Hormuz remains partially blocked.
For the FAO’s “Systemic Shock” Warning: Multiple international news outlets have confirmed and amplified the FAO’s warning, indicating that the international community is taking the risk seriously. Spanish Prime Minister Pedro Sánchez has issued a parallel warning. The policy recommendations have been widely published.
For Somalia and South Sudan: The humanitarian emergencies are no longer warnings — they are “present emergencies.” In Burhakaba district of Somalia’s Bay region, the Global Acute Malnutrition (GAM) rate is 37.1%, meaning “in some communities, malnutrition is the norm, not the exception.” In South Sudan, the FAO confirms that multiple counties are in IPC Phase 5 (Catastrophe). The window to act is narrowing, as the FAO Director-General stated.
For Global Food Prices: The USDA corn production forecast of 16 billion bushels (down 1 billion bushels from the record) has been confirmed. While this would be the second largest on record, the decline is significant. Fertilizer shortages continue to affect planting decisions in the world’s largest grain producer.
Current Status Summary (As of May 29, 2026)
| Question | Answer |
|---|---|
| Has the US threatened sanctions over Strait of Hormuz tolling? | YES — Treasury Secretary Bessent threatened Oman on May 28 |
| Has Iran’s tolling authority been sanctioned? | YES — US sanctioned “Persian Gulf Strait Authority” |
| Has Oman agreed to participate in tolling? | NO — Omani ambassador assured US “no plans for tolling” |
| Has the Strait of Hormuz diplomatic situation been resolved? | NO — US and Iran accused each other of ceasefire violations on May 28 |
| Has the FAO “systemic shock” warning been confirmed by other outlets? | YES — multiple international news outlets reported May 27-28 |
| Is Somalia’s famine risk still current? | YES — “present emergency” with 37.1% GAM rate in Burhakaba |
| Is South Sudan’s hunger crisis still current? | YES — 7.8 million affected; IPC Phase 5 in multiple counties |
| Is the US corn production forecast still 16 billion bushels? | YES — USDA May 2026 Feed Outlook confirms |
| Is El Niño still probable? | YES — 82% emergence probability (unchanged) |
| Has India’s wheat export ban been lifted? | YES — unchanged |
| What is the GAM rate in Burhakaba, Somalia? | 37.1% — IPC Phase 5 (extremely critical) |
What to Watch For (Updated Timeline)
| Event | Expected Timing | Significance |
|---|---|---|
| Oman’s formal response to US sanctions threat | Unknown | Could affect regional diplomatic alignment |
| US-Iran ceasefire talks | Ongoing but strained | Further violations could lead to breakdown |
| G7 response to FAO “systemic shock” warning | Unknown | Potential coordinated action on reserves, trade, and financing |
| India monsoon planting season | June 2026 | Fertilizer availability will determine fall harvest |
| El Niño emergence | May-July 2026 | Would trigger agricultural production forecast revisions |
| FAO June Food Price Index | Late June 2026 | Will show whether May acceleration continued |
| Q3-Q4 2026 production data | Late 2026 | Will show full harvest impact of fertilizer shortfall |
| Somalia humanitarian response | Ongoing | Funding currently at only 15.2% of requirements |
Sources
- Moneycontrol / AFP (May 29, 2026) – “US Treasury Secretary Scott Bessent threatens to sanction Oman if it joins Hormuz tolls” – Sanctions threat, Omani ambassador meeting, Iran sanctions, US-Iran ceasefire violations
- Vietnam.vn (May 26, 2026) – “Warning of systemic shock to the global food and agricultural network” – FAO Director-General address, Spanish Prime Minister Sánchez warning
- AWANI International / Reuters (May 27-29, 2026) – “Disruption in Strait of Hormuz could trigger global food security crisis – FAO” – FAO warning, fertilizer impact
- 3News (May 27-28, 2026) – “Middle East crisis: Time running out to avert global food security crisis – FAO warns” – Detailed FAO Director-General address, policy recommendations
- ReliefWeb / Action Against Hunger (May 25-26, 2026) – “Somalia Faces Deepening Hunger Crisis as Risk of Famine Emerges in Burhakaba” – 6 million affected, 37.1% GAM rate, “present emergency”
- Africa.com / IPS (May 18-20, 2026) – “South Sudan Faces Deepening Famine Without Urgent Humanitarian Aid” – 7.8 million affected, 73,300 in IPC Phase 5, WFP and UNICEF quotes
- FAO Emergency and Resilience (May 19, 2026) – “South Sudan” – IPC Phase 5 counties confirmed (Akobo, Fangak, Nyirol, Uror, Luakpiny/Nasir, Ulang)
- Ag Proud (May 26, 2026) – “May 2026 USDA Feed Outlook report” – US corn production 16 billion bushels, 1 billion bushel decline (6% below record)
- Previous article: The Compound Shock Deepens: FAO Director-General Warns of “Systemic Shock” as Somalia Faces First Famine Risk Since 2022 – Fertilizer Crisis Confirmed as Primary Transmission Mechanism (The 5 Ws, May 27, 2026) – Baseline information on FAO warning, Somalia, South Sudan, fertilizer transmission, US corn production
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