US diesel prices reach all-time high amid Iran conflict

Fuel prices have soared since the Iran conflict began at the end of February 2026, mirroring the surge in wholesale oil prices. The conflict, which involves Iran and the United States, has disrupted global oil markets, leading to a sharp increase in diesel prices. California, a major agricultural and transportation hub, is bearing the brunt of the economic strain, with local farmers and trucking companies reporting significantly higher operational costs. Record-high diesel prices are squeezing California’s economy, driving up fuel and operational costs for local farmers, trucking fleets, and supply chains. The impact is felt across multiple sectors, from agricultural production to logistics, as businesses face rising expenses and potential supply chain disruptions. The situation has raised concerns about the long-term economic stability of the region.