An inflation report on Tuesday will provide a fresh gauge of prices as the Iran war ratchets up costs for gasoline, airfares and other expenses.

Economists expect consumer prices to have risen 3.8% in April, when a surge in gasoline costs took hold weeks into the war, which would mark a significant acceleration from 3.3% in the previous month.

As recently as February, inflation stood at 2.4%, clocking in just a tick above the Federal Reserve’s target level of 2%.

The Middle East conflict prompted the Iranian closure of the Strait of Hormuz in March, a maritime trading route that facilitates the transport of about one-fifth of global oil supply. The standoff prompted one of the largest oil shocks ever recorded.

The U.S. is a net exporter of petroleum, meaning the country produces more oil than it consumes. But since oil prices are set on a global market, U.S. prices move in response to swings in worldwide supply and demand.

Crude oil is the main ingredient in auto fuel, accounting for more than half of the price paid at the pump, according to the federal U.S. Energy Information Administration.

The price of an average gallon of gas stood at $4.52 as of Monday, AAA data showed – an increase of $1.54 per gallon since the war began on Feb. 28. That amounts to a nearly 52% price jump in about two-and-a-half months.

The surge in fuel prices sent costs surging for gas-dependent transportation, such as airline tickets. In March, airfare costs jumped more than 3% from a month earlier.

Within weeks, the jump in prices could spread to groceries, furniture and just about any other item delivered by diesel-fueled trucks and tankers, some analysts previously told ABC News.

The recent rise in prices has left many consumers feeling glum. In May, consumer sentiment fell to the lowest level ever recorded, according to a monthly survey conducted by the University of Michigan since 1978.

Consumer spending, which accounts for about two-thirds of U.S. economic activity, could weaken if shoppers remain pessimistic. In theory, a slowdown of spending could slow the economy.

By some measures, however, the U.S. economy has proven resilient amid the war.

Hiring slowed in April but remained solid, exceeding economists’ expectations, federal government data last week showed. The unemployment rate held steady at 4.3% in April, a low level by historic standards. Additionally, the economy grew at an annualized rate of 2% in the first quarter of 2026, marking an acceleration from 0.5% growth recorded in the previous quarter.

However, a persistent increase in consumer prices may put pressure on the Fed to raise interest rates as a means of dialing back inflation.

The Fed has opted to hold interest rates steady at three consecutive meetings since the outset of 2026. Before that, the Fed cut interest rates a quarter-point three straight times.

If the Fed moved to raise interest rates, it would hike borrowing costs for many consumer and business loans, risking an economic slowdown.

Markets forecast a roughly 70% chance of interest rates holding steady for the remainder of this year, according to the CME FedWatch Tool.