The worst storm-driven gas price hikes haven't hit California

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California has been spared the worst of the gas price hikes related to Hurricane Harvey.

As the storm barreled into the Texas coast, a string of oil refineries closed, temporarily dropping U.S. refinery capacity. That sent shockwaves through the wholesale oil market, said Tom Kloza, chief oil analyst with the Oil Price Information Service.

"Harvey had a ripple effect on all of the continents, where the price of gasoline globally went up 10 to 20 cents," he said. 

The average price of gasoline in the U.S. is now $2.52 a gallon, the highest it's been all year.

There was better news in California – gas prices only rose by an average of 6 cents per gallon last week.

That's because the state's gasoline does not come from Texas,  Kloza said. 

Rather, it is a special blend, refined in-state. It's also subject to California's strict environmental standards and costs more.

So while Californians are seeing a smaller spike in gas prices, they are still paying more for their gasoline than most other Americans – the average price for gasoline in Los Angeles is $3.08 per gallon.

The Texas refineries are beginning to come back online, but in the meantime Americans will see higher gas prices as they set off on Labor Day weekend getaways and throughout September.