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California diesel prices surge on Iran war shock, national supply chain feels the strain

8/3/2026

The Iran war has pushed diesel prices higher in California, the state that already holds the country's highest gas prices and is home to its busiest containership port.

Those two factors together give the conflict's energy shock a reach that extends well beyond California's borders.

California's starting position California entered the Iran war at the top of the national fuel price table.

The state carries the highest gas prices in the country, and the conflict pushed diesel prices higher from that already elevated base.

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