Several major refineries along the Gulf Coast are shut down because of Tropical Storm Isaac and that's driving up gasoline prices in Oklahoma.
The most common price around the Tulsa Tuesday morning is $3.69 a gallon.
That's more than ten cents higher than Monday afternoon. The national average was up to $3.75 a gallon.
It could be three days before most of those refineries in Louisiana and Texas get back to full operation.
Experts predict gasoline prices will go even by the end of the week.