Global crop prices have surged to their highest levels in three years as a convergence of geopolitical crises and extreme weather events squeezes the world’s grain supply.

The closure of the Strait of Hormuz has effectively blockaded approximately 3.9 million tonnes of Middle Eastern urea exports, cutting off roughly 30 percent of the region’s annual fertilizer trade.

Urea is a critical nitrogen-based fertilizer used across virtually every major agricultural system, meaning supply disruptions translate almost immediately into higher production costs for farmers worldwide.

Those higher costs are now working their way through global supply chains and landing directly on supermarket shelves, with food prices rising across multiple categories.

Compounding the fertilizer shortage, ongoing attacks in the Black Sea region have disrupted grain shipments from one of the world’s most important agricultural export corridors.

The Black Sea basin is a primary source of wheat, corn, and sunflower oil for markets across Europe, the Middle East, and North Africa, making any disruption there felt almost instantly in global commodity prices.

Simultaneous heat waves have further stressed crop yields in key producing regions, adding a climate-driven dimension to what is already a severe supply crunch driven by conflict.

A new United Nations report has warned that the combined impact of conflict-driven energy and fertilizer cost increases could push between 9 and 18 million more people into hunger worldwide.

That figure represents a significant acceleration of food insecurity trends that were already being tracked with concern by international aid organizations heading into the second half of the decade.

The warning from the UN underscores how quickly localized geopolitical events, such as a strait closure or regional conflict, can ripple outward to affect the most vulnerable populations across the globe.

Fertilizer prices, energy costs, and grain futures are now moving in lockstep, creating a feedback loop that agricultural economists say could take months or years to fully unwind.

Governments and food security agencies are being urged to accelerate emergency procurement strategies and invest in alternative supply routes before the price pressures deepen further into the global food system.