Under OpCon 4, Santee Cooper officials say preparations are focused on ensuring system reliability and readiness. “The extreme cold weather means customers will be using more electricity. Utility officials note that home heating is the primary driver of increased electricity use during prolonged cold weather. Many utilities, including Santee Cooper, adjust fuel charges based on actual fuel costs, which may increase during periods of extreme demand. Santee Cooper officials said they will continue monitoring conditions and adjusting operations as needed as the winter weather event unfolds.