The Railroad Commission of Texas (RRC) is investigating the performance of Dallas-based Atmos Energy Corp.’s Mid-Tex Division during Winter Storm Elliott after thousands of customers experienced issues with their natural gas service.

Gov. Greg Abbott called for the investigation after Atmos asked its North and Central Texas customers to curb natural gas use as the winter freeze swept into the state. The Texas investigation follows an inquiry underway by federal regulators about the stability of the nation’s bulk power systems in the wake of the tragic storm. 

Abbott sent letters to the Texas attorney general and RRC asking them to examine why Atmos was unable to provide natural gas services. Some residents early on Dec. 23 lost gas service needed to operate furnaces, stoves...