By Rosemary
California is facing mounting pressure on its fuel system as gasoline inventories fall to historic lows and prices surge, with analysts warning that the full impact of global supply disruptions linked to the Iran conflict has yet to be fully felt across the state.
According to data from the American Automobile Association, the average price of gasoline in California reached $5.86 per gallon as of Thursday, the highest in the United States and significantly above the national average of $4.09 per gallon. Prices have climbed sharply in recent weeks, rising roughly 26% since the onset of the conflict involving Iran, reflecting tightening supply conditions and heightened volatility in global energy markets.
At the same time, fuel inventories within the state have dropped to their lowest levels in at least two decades. Figures from the California Energy Commission show that gasoline stocks averaged approximately 9.44 million barrels over the four weeks ending April 10, the lowest level recorded since the agency began tracking the data in 2005. These inventories include California-specific gasoline blends, blending components, and other related fuels.
The supply strain is being exacerbated by California’s structural dependence on imported fuel. Unlike much of the United States, the state operates largely in isolation from major interstate pipeline networks, limiting its ability to draw on domestic supplies from other regions. Instead, California relies heavily on shipments of refined petroleum products from Asia, where refineries process crude oil—often sourced from the Middle East—into gasoline and other fuels destined for the U.S. West Coast.
This reliance has made California particularly vulnerable to disruptions stemming from the effective closure of the Strait of Hormuz, a critical maritime corridor through which roughly one-fifth of the world’s oil and gas supply typically flows. With shipping routes constrained and global supply chains under stress, analysts say the consequences are only beginning to ripple through to end markets such as California.
State officials have acknowledged the risks but say they are closely monitoring the situation. The California Energy Commission said it is maintaining ongoing communication with in-state refiners to help ensure adequate transportation fuel supplies during what it described as a period of significant supply contraction.
Despite those assurances, market observers caution that the most acute phase of the supply crunch may still lie ahead. Because it can take several weeks for fuel shipments to travel from Asia to the U.S. West Coast, the immediate impact of reduced imports has not yet been fully reflected in terminal inventories or retail fuel availability.
Analysts expect a sharper decline in incoming shipments over the next one to two weeks, at which point the disruption is likely to become more visible at storage facilities and, ultimately, at gasoline stations.
Further compounding the situation is a longer-term shift in California’s energy landscape. Once a major oil-producing state, California has become increasingly dependent on imported crude and refined products in recent years. The closure of two major refineries—accounting for roughly 20% of the state’s refining capacity—has reduced in-state production, leaving the market more exposed to external shocks.
Crude oil inventories have also declined, with state data indicating stockpiles of approximately 10.09 million barrels, down more than 23% compared with the same period a year earlier. The reduction in both crude and gasoline reserves limits the state’s ability to buffer against sudden supply interruptions.
In response, refiners are seeking alternative sources of crude oil and refined products to offset the loss of Middle Eastern shipments. While officials have expressed confidence that current inventory levels should be sufficient through mid-May, uncertainty remains high as global conditions continue to evolve.
California’s fuel consumption adds further pressure to the system. The state uses roughly 36 million gallons of gasoline per day, making it one of the largest fuel markets in the country. Even relatively small disruptions in supply can therefore have outsized effects on prices and availability.
The convergence of geopolitical tensions, constrained import flows, and reduced local refining capacity has created a fragile environment for California’s fuel market. With inventories already at record lows and additional supply shocks expected in the coming weeks, the state appears poised to remain at the forefront of the nation’s energy price surge.