Gasoline prices in the United States have risen sharply, with the average price for regular fuel climbing 31 cents in the past week to $4.54 per gallon, according to AAA. That is about 52 percent higher than prices before the war with Iran began, as supply disruptions continue to affect global oil markets.

The conflict has strained shipping through the Strait of Hormuz, a key route for roughly 20 percent of the world’s crude oil flow, adding pressure to fuel costs. The latest increase comes after weeks of volatility in oil markets and adds to concerns about higher transportation costs for consumers and businesses.