High gas prices shown at a Shell gas station in San Francisco, Friday, Aug .10, 2012. A surprise surge in gasoline prices is taking some of the fun out of summer. The national average for a gallon of gas at the pump has climbed to $3.67, a rise of 34 cents since July 1. An increase in crude oil prices and problems with refineries and pipelines in the West Coast and Midwest, including a fire in California, are mostly to blame. (AP Photo/Paul Sakuma)