The national average price of diesel in the U.S. has surpassed $6 per gallon for the first time ever, according to GasBuddy, a price-tracking firm. This record high, reported on Thursday, marks a significant increase from approximately $3.70 a year ago, with AAA data showing the average at $5.98 per gallon on Thursday.

The surge in diesel prices is largely attributed to the intensification of the U.S.-Iran conflict and Ukrainian drone attacks on Russian refineries. These geopolitical events have squeezed global oil supply and refining capacity, pushing Brent crude futures above $100 a barrel. Petroleum expert Patrick De Haan from GasBuddy highlighted that the global economy relies heavily on diesel for almost every piece of heavy machinery, and the current supply constraints, especially from Russia, are a major problem.

Economists are concerned about the ripple effects of these elevated prices on consumers. While businesses have largely absorbed the higher costs so far, this is expected to change as contracts are renegotiated. Thomas Ryan, a senior North American economist at Capital Economics, noted that households would likely have to weather these higher costs for the remainder of the year. The Department of Labor also reported that rising diesel costs, up 24.1% last month, accounted for over a third of the jump in goods prices for producers in August.

The impact on consumers will be widespread, affecting the cost of transporting goods via trucking and rail, as well as prices in construction and farming. Foods requiring refrigeration and long-distance travel, such as seafood and fresh produce, are particularly vulnerable to price increases. Experts like De Haan predict that if these high diesel prices persist for more than six weeks, the trickle-down effect will become much more noticeable, impacting everything from furniture to new car destination charges. Some California pumps have even maxed out their displays at $9.999 per gallon, reflecting the severity of the price surge.