California Eases Carbon Costs as Iran War Drives Gas Above 6 Dollars

California is facing one of the worst fuel affordability crises in its history, and state regulators have begun unwinding key parts of their climate program to keep refiners from shutting down. The pressure traces back to late February 2026, when the conflict between the United States and Iran escalated and the Strait of Hormuz was closed to commercial traffic. That closure choked off a major share of global crude and refined product flows, and the effects reached California faster than almost anywhere else in the country because the state runs an isolated fuel market.

California sits apart from the refining centers of Texas and Louisiana, with only thin pipeline links to the rest of the United States. It also requires its own special blend of gasoline to meet strict environmental rules, so it cannot easily pull supply from other regions. To cover the gap, the state imports close to 20 percent of its refined fuel from Asia. Once shipments from China, South Korea, and Singapore were disrupted in the wake of the Hormuz closure, Asian refiners cut crude runs and held back exports to serve their own domestic demand, leaving California short.

The price record tells the story of the past three months. In early March 2026, soon after the conflict broke out, California regular gasoline averaged about 5.16 dollars per gallon. By mid May it had climbed past 6 dollars, reaching roughly 6.15 dollars on May 12 according to AAA, the highest in the nation and far above the national figure near 4.36 dollars. Some metros such as Salinas and Santa Rosa were already at 6.28 dollars. Governor Gavin Newsom has pushed rebate checks of up to 800 dollars for registered vehicle owners, though lawmakers have only partly embraced the plan.

The affordability backlash has now reshaped climate policy. On Friday May 29, 2026, after two days of hearings and heavy lobbying from the oil sector, the California Air Resources Board voted 10 to 3 to overhaul its Cap-and-Invest carbon market. The board doubled its Manufacturing Decarbonization Incentive Fund to 4 billion dollars, steering free pollution allowances toward oil refiners and other heavy industry, and added 800 million dollars in compliance support so that costs are not passed through at the pump. The changes are scheduled to take effect on September 1, 2026.

Earlier in the year regulators had proposed the opposite direction, planning to pull about 118 million allowances out of the market to stay on track for the 2030 emission targets. For refiners that would have meant either deeper emission cuts or higher allowance costs, and several had already signaled they were weighing an exit from the state. Chevron warned that California was drifting toward an energy crisis because of the Iran war and said it might stop refining in the state unless taxes and rules were eased. The company runs the El Segundo refinery near Los Angeles International Airport, the largest on the West Coast at roughly 290,000 barrels per day, which supplies about a fifth of Southern California gasoline and more than 40 percent of its jet fuel.

Chevron refining executive Andy Walz described potential fuel shortages as his biggest worry, pointing to Asian refineries cutting crude and producing fewer products, and questioning whether San Francisco and Los Angeles would have the jet fuel and gasoline they needed. He argued in March that tightening the carbon program made little sense given the global tensions at the time.

The situation remains active. The carbon market relief addresses one cost pressure on refiners, but it does not restore the lost import flows or reopen the Strait of Hormuz, so the underlying supply squeeze continues into late May. Analysts note national security concerns as well, since California hosts a large share of the country's military personnel and defense activity. The US-Iran conflict has also prompted other states such as New York and Massachusetts to scale back climate commitments. For now California drivers continue paying the highest pump prices in the country while regulators try to keep the state's remaining refineries running.