Gas prices went up more than 30 cents a gallon last week. How high could they go? NPR Why is gas so high in Illinois? Gas prices today increased amid Iran war, after BP Whiting, Indiana refinery power loss ABC7 Chicago Average price of gas in California edges past $6 a gallon, highest level in four years The Guardian Americans Spent $125 Million More on Gas Friday Than They Did a Week Ago WSJ When will gas prices drop? Columbus hovers near $5 as expert predicts relief The Columbus Dispatch