COLUMBIA, SC (WOLO)-- Gas prices nearly doubled over the week, prompting concern from drivers. Here in the midlands, ABC Columbia news found prices ranging from $3.29 a gallon to $3.45 a gallon. That's nearly 30 cents higher than prices were two weeks ago, when midlands drivers were paying an average of $3.08 per gallon. Experts say that prices could spike even more as we near August, then the Labor Day holiday.