The national average price for regular retail gasoline rose last week for the first time since it peaked in early April, when the weekly average was $3.92. On average, stopping at the gas station cost drivers $3.38 per gallon, up 5 cents from the week before. Tennessee’s average price of $3.09 was 8 cents from the week prior, according to AAA Auto Club South.

The two main factors that pushed oil prices higher last week were the European sanctions against Iran and an agreed-upon plan by European leaders to save the euro and resolve the ongoing debt crisis. Concerns that Iran will block the Strait of Hormuz and disrupt global oil supply have resurfaced as European sanctions against the country went into effect July 1.