The average price of a gallon of regular unleaded gasoline jumped six cents overnight in San Antonio, according to AAA's daily fuel gauge report.
The average price for a gallon in San Antonio is $3.63.
That jump is likely linked to refineries in the gulf shutting down ahead of Hurricane Isaac.
"What do we have to do with the hurricane over here? How come our gas prices have to go up? I don't understand that?" Tibbs Sasaldua said.
He's not the only driver who is baffled by the jump in prices. Some spots in the Alamo City climbed as much as a dime since Tuesday.
"I don't understand it. I don't know why that makes a big difference," Anita Smith said.
Ray Bazaldua owns a painting company and spends about $150 on gas every week just to take care of the necessities of his job.
"We always look for the best price, but sometimes you can't go. It's like way on the other side (of the city) something, so you just have to (get) gas wherever," Ray Bazaldua said.
He said he has been trying to keep painting jobs near his home, but the higher cost of doing business still means a higher cost of service for customers.
The reason for the climbing cost of fuel might not be clear to many drivers, but what they know all too well is that prices often drop much slower than they shoot up.
"My husband and I are getting ready to leave in October with this car to take it to our son in Vermont to school, and we are not looking forward to the gas prices for that trip," Smith said.