The average price for a gallon of regular gasoline ticked up 7 cents overnight to hit $4.22, now more than a dollar above what it cost at this point last year, according to AAA.

The price of oil has surpassed $100 a barrel for the first time in almost six weeks after attacks on oil facilities and ships in the Middle East threatened to debilitate an already weakened supply chain.

Prices were on the rise after the Saudi energy ministry – the world’s largest oil exporter – said operations at some of its facilities had been disrupted by strikes from Iran-aligned Houthis.