The average price of gas in the US went up for a second day in a row on Thursday after a 99-day decline.

California's Bay Area Continues To Have The Highest Gas Prices In The Country

There are gas prices over $7 a gallon displayed at a gas station. The photo was taken byJustin Sullivan.

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The average cost for a gallon of regular gasoline in Iowa has gone up 15.8 cents in the past week.

In the past week, Oklahoma's prices have increased by more than any other state, followed by New Mexico, where prices have gone up by more than any other state.

The West, Great Plains and upper Midwest seem to be leading the way in the price spike, with many states already having the most expensive gas.

California has the most expensive gas in the U.S., at $5.52 a gallon, and prices are up eight cents over the last week.

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In the South and Northeast, gas prices are mostly on the decline. Rhode Island's gas prices have fallen by more than any other state in the US over the past week, dropping by more than any other state in the country.

Key Background

Concerns about Russia's invasion of Ukraine, a diminishing refining capacity in the U.S. and an increase in demand caused gas prices to go up in the US. The national average price peaked at an all-time high of $5.02 a gallon on June 14 but quickly collapsed due to weak demand and worries about the economy. There is a possibility of an increase in the war in Ukraine as well as an increase in the number of hurricanes.

Tangent

The decline in gas prices slowed the rate of inflation in the US. The 8.3% inflation rate in August was still higher than the Federal Reserve's 2% target.

Inflation went up in August, but it slowed for the second month in a row as gas prices fell.

Gas prices in the US are going up for the first time in a long time.

There are more tropical threats in the Atlantic.

Putin hired 300,000 Reservists to fight in Ukranian as he supported referendums in Russian territories.

Gas could be as low as $3.50 a gallon in some states.

Here are the states where gas prices are the most expensive and cheapest.