For those filling up on gas this week, the cost has soared literally almost overnight.
"It's pretty high, I looked over here and said wow that's really up there," said University of Iowa student Cameron Avey.
"I would have to save up my paycheck and not go out, use that money for gas," said UI student Victoria Munyakazi.
The timing isn't good for Hawkeye fans. Thousands will flock to Soldier Field in Chicago for the season opener against Northern Illinois. Now, the trip costs a bit more.
"It's really ridiculous, and I'm afraid it's not going to stop here. I'm really worried," said Jennifer Laughlin, who will be making the trip.
AAA estimates drivers may see a 10¢ to 20¢ increase per gallon in gas from this week to last.
At one station in Iowa City, people are paying $3.79.
Experts say Hurricane Isaac will affect supply, causing a temporary price hike.
"Whenever a hurricane comes through that part of the country, through Louisiana and Florida, there's a lot of refinery capacity down there, and they're required to shut that down temporarily while the hurricane is going on," said John Solow, UI professor of economics.
Gas prices are expected to come back down by the middle of next week.
It's still too little too late for holiday travelers, including those Hawkeye fans who will pay more than $4 per gallon in Chicago.
"We'll have to make sure that we get a full tank before we get downtown because I was just there last week and it's already over four dollars," Laughlin said.