Diesel fuel in the U.S. has reached a record high of $6.45 per gallon, a 74% increase year-over-year, driven by supply disruptions from the Russia-Ukraine war, Iran conflict, and closure of the Strait of Hormuz. Higher diesel costs are expected to ripple through trucking, agriculture, and other industries, ultimately raising prices for consumers on food and everyday goods since diesel powers much of the nation's freight network.