That spike in demand pushed prices higher, and was exacerbated by the retirement of coal-fired and nuclear plants, in favor of electric generators.
Meanwhile, natural gas production has been slow to come back online after waves of shutdowns during the Covid-19 pandemic.
Today, the price of natural gas is at levels not seen in more than a decade.
The company said the increases are directly related to higher natural gas prices.
"For many struggling families, higher prices can mean being forced to choose between heat, food or medication," the association said.