Natural gas consumption now peaks twice a year, according to the latest data by the U.S. Energy Information Administration.
For decades, gas use would hit a seasonal peak each winter when demand for space heating would soar.
Now utilities increasingly rely on natural gas to generate electricity. That has created a second gas peak in the summer, when electric utility air conditioning loads climb with the temperature.
The electric power sector became the largest user of natural gas six years ago, when it passed the industrial sector, EIA reported.