Gas prices are climbing again this May because the Strait of Hormuz—a critical global oil chokepoint through which 20% of the world’s oil flows—has been effectively shut down since late February 2026 following U.S. and Israeli military operations against Iran. With 10 to 12 million barrels of crude blocked from global markets, the ripple effects are hitting American pump prices hard.
The national average for regular gasoline reached $4.55 per gallon as of May 7, 2026, marking the second consecutive week of 25-cent increases and the highest prices seen since 2022. For consumers, this means real pain at the pump. A driver filling a typical 15-gallon tank today pays roughly $68 compared to $28 a year ago—a difference of $40 that directly comes out of household budgets when combined with grocery inflation and rent increases. The situation has escalated beyond temporary market jitters into a sustained supply crisis, with some analysts warning prices could breach $5.00 per gallon if the Strait remains closed through June.
Table of Contents
- How Quickly Are Gas Prices Spiking This Week?
- The Iran War and the Strait of Hormuz Supply Crisis
- Which States Are Being Hit Hardest by High Gas Prices?
- Supply Chain Pressures Beyond Oil Imports
- How Long Will Prices Stay Elevated?
- Government Response and Policy Actions
- What Happens Next—Outlook Through Summer 2026
- Conclusion
How Quickly Are Gas Prices Spiking This Week?
The pace of increases is alarming households across the country. Prices have jumped 25 cents in each of the past two weeks—that’s $3.75 extra per fill-up for the average American driver—and they show no signs of stabilizing. Compared to one year ago, gas is now $1.40 more expensive per gallon, representing a 44% year-over-year increase that outpaces wage growth for most workers.
State-by-state variations reveal just how uneven this crisis hits. California drivers are paying $6.17 per gallon—nearly $2.19 more than Oklahoma residents, who enjoy the nation’s lowest average of $3.98 per gallon. A Californian filling up once a week faces an annual gas cost that exceeds $16,000, while an Oklahoma driver pays roughly $10,400 for the same driving. This regional disparity matters because California has tighter fuel specifications and limited refinery capacity, making it more vulnerable to supply shocks.
The Iran War and the Strait of Hormuz Supply Crisis
The geopolitical root cause is stark: the Strait of Hormuz has been functionally closed since February 28, 2026. That narrow waterway separating Iran from Oman typically handles roughly 21 million barrels of crude oil daily—one-fifth of global petroleum supply. When the U.S. and Israel launched military operations against Iran, the strait became a war zone, and shipping traffic essentially halted. Currently, between 10 and 12 million barrels remain blocked from reaching global markets. The economic impact is unprecedented in scope. The World Bank now predicts a 24% spike in global energy prices during 2026—the largest increase since Russia invaded Ukraine in 2022, which had driven prices to record highs.
This forecast assumes the Strait opens within a reasonable timeframe; if closure persists, the increases could accelerate further. Brent crude oil has already climbed to $114.40 per barrel as of May 5, 2026, the highest level all year, while U.S. crude has spiked to $116.55 per barrel. A critical limitation in current projections is that they assume diplomatic channels will succeed. The U.S. did send a memorandum to Iran on May 7 proposing an end to the two-month war with gradual resumption of tanker flows, but implementation remains uncertain. If negotiations stall or escalate further, prices could accelerate beyond current World Bank estimates within weeks.
Which States Are Being Hit Hardest by High Gas Prices?
Geography dictates pain levels across America. California’s $6.17 average reflects both its isolation from the main U.S. pipeline system and regulatory requirements that mandate cleaner-burning fuel blends. Washington State follows closely, while Texas, despite being the nation’s largest oil producer, has seen prices climb because refineries throughout the Gulf Coast export much of their output to global markets at higher prices rather than serving domestic consumers at lower margins.
Coastal states generally suffer more because they depend on ocean transport and lack direct pipeline access to Midwest refineries. Rural areas face an additional squeeze because gas stations have higher per-unit distribution costs, meaning prices in small towns often exceed nearby cities. A driver in rural Mississippi might pay $4.75 while a Memphis resident, 50 miles closer to a major distribution hub, pays $4.35—a differential that compounds over a year of driving. The hardship falls disproportionately on working-class households and rural communities. Someone earning $35,000 annually now dedicates 8-10% of gross income to gasoline alone, versus roughly 5% a year ago. This diverts money from groceries, childcare, and medical expenses for millions of families operating on tight margins.
Supply Chain Pressures Beyond Oil Imports
U.S. gasoline inventories have fallen for the 11th consecutive week, but the problem isn’t just import disruptions—it’s a refinery capacity problem. American refineries are intentionally shifting production capacity away from gasoline toward diesel and jet fuel, which command higher prices and face their own supply pressures from the Iran crisis. This means even if crude oil prices stabilized tomorrow, refineries wouldn’t immediately switch back to maximizing gasoline output. The tradeoff is brutal for consumers. Diesel prices have climbed even faster than gasoline, driving up transportation costs for food, goods, and services that depend on trucking.
Jet fuel spikes are pushing airline ticket prices higher. In essence, oil markets are prioritizing the energy inputs that generate maximum profit rather than the one that puts gas in cars parked in American driveways. A consumer choosing to use diesel vehicles hoping to save money would actually find little advantage, given the parallel price increases across fuel types. Refinery maintenance also plays a role. Several major refineries are scheduled for seasonal maintenance in May and June, which reduces gasoline production capacity precisely when demand peaks before the summer driving season. The combination of reduced imports, deliberate capacity shifts, and planned maintenance creates a supply squeeze that amplifies price pressure.
How Long Will Prices Stay Elevated?
Current analyses suggest prices could remain above $4.50 per gallon through summer if the Strait of Hormuz remains closed. If negotiations succeed and tanker flows resume partially by June, prices might stabilize in the $4.25-$4.50 range. The downside risk is stark: if the Strait remains blocked through July, analysts warn prices could approach or exceed $5.00 per gallon nationally, with California potentially seeing $7.00+ per gallon. A critical warning: markets don’t adjust prices downward as quickly as they rise them. Even if the Strait reopens tomorrow, crude oil inventory rebuilding would take weeks or months, and futures markets price in expected future supply recovery, not current conditions.
Drivers shouldn’t expect a dramatic price crash the moment good news breaks. History shows 50-cent price spikes are often followed by 25-cent retreats over 4-6 weeks rather than immediate reversals. Consumer behavior also creates sticky-high prices. When people reduce driving or shift to carpooling, fuel demand declines but prices don’t fall proportionally because refineries operate with fixed costs. They’d rather sell less fuel at $4.50 per gallon than cut prices aggressively to maintain volume—their profit margins are broader at higher prices.
Government Response and Policy Actions
The Trump administration has been constrained in its response options. The Strategic Petroleum Reserve (SPR) is already at historically low levels from prior administrations’ releases during previous price spikes. Drawing down reserves further would provide only temporary relief (a few weeks of supply) while surrendering future price-stabilization capacity. The administration has signaled support for increased domestic drilling, but new production doesn’t materialize for 18-24 months at minimum.
The most direct intervention remains diplomatic—ending the Iran conflict and restoring Strait traffic. The May 7 memorandum proposing gradual resumption of tanker flows is the primary policy lever available. Domestic policy options like releasing more SPR reserves would provide visible political relief but address a symptom rather than the root cause of the shortage. Trade policy could encourage allies to increase shipments, but most nations are already maximizing exports given high prices create their own profit incentives.
What Happens Next—Outlook Through Summer 2026
If the Iran conflict resolution progresses as negotiations suggest, a gradual reopening of Strait shipping in May-June 2026 could start easing pressure by mid-summer. Prices might plateau at $4.25-$4.50 per gallon by July, a painful but manageable level compared to current trajectory.
However, this optimistic scenario assumes no escalation, no new geopolitical shocks, and successful implementation of tanker-flow agreements. The alternative scenario—continued closure or delayed reopening—pushes prices toward $5.00+ per gallon and creates secondary effects: airlines raising fares, shipping companies adding fuel surcharges, food prices rising at checkout, and overall inflation spreading beyond energy sectors. That outcome would likely force more aggressive government intervention through SPR releases or other measures, effectively borrowing from future price stability to ease today’s pain.
Conclusion
Gas prices are rising this May fundamentally because war in the Middle East has closed the Strait of Hormuz, blocking 20% of global oil supply from markets. The national average of $4.55 per gallon reflects a 44% increase over one year and puts real strain on household budgets—drivers are paying $40 more per tank than last May. Regional variations show some communities facing significantly greater pain, with California drivers paying nearly $2.20 more per gallon than those in Oklahoma.
The path forward depends entirely on whether diplomatic efforts succeed in reopening the Strait. Prices could stabilize in the $4.25-$4.50 range by summer if negotiations succeed, but could approach $5.00 per gallon or higher if the closure persists. Consumers should expect prices to remain elevated through June at minimum and should monitor news about Iran negotiations and Strait shipping status as the primary indicator of when pump prices might finally begin declining. For now, high gas prices aren’t a temporary blip—they’re the new reality of a disrupted global energy market.