The operator of Texas's power grid on Sunday called on state residents for the second time this year to conserve energy,

Warning of potential rolling blackouts amid predictions for record-high temperatures on Monday.

The state faces a "potential reserve capacity shortage with no market solution available,"

It was issuing an energy emergency alert that advised of the potential for rolling blackouts.

Temperatures across the state hit records on Sunday,

105 degrees Fahrenheit (40.6 degrees Celsius) recorded at Houston's Bush Intercontinental Airport,

Surpassing the record of 101F set in 1909, according to the U.S. National Weather Service (NWS).

ERCOT has asked residents to conserve electricity between 2 p.m. and 8 p.m.,