[PR Newswire] – GREENVILLE, S.C., July 1, 2014 /PRNewswire/ — Higher fuel costs caused by the extreme weather conditions associated with this winter’s polar vortex contributed to a slight increase in the fuel . . . → Read More: Company Update (NYSE:DUK): Duke Energy Progress customers in South Carolina to see slight increase in fuel rates Similar Articles: Stock Update (NYSE:DUK): Duke Energy Florida proposes new generation investments to benefit customers, increase reliability Duke Energy Corp (NYSE:DUK) | Duke Energy Florida to sell unused nuclear fuel assemblies from retired Crystal River Nuclear Plant Company Update: Duke Energy Corp (NYSE:DUK) – Duke Energy makes progress on restoring power to customers