The Electric Reliability Council of Texas (ERCOT) reported record electric use as most of the state deals with the extreme cold weather.
ERCOT declared its highest emergency alert level early Monday morning and ordered rolling power outages to deal with the demand.
Energy providers cut power off to select customers for 15 to 30 minutes at a time.
ERCOT set a new winter peak demand record Sunday evening, reaching 69,150 MW. That's higher than the previous winter peak set back in January 2018.
The Texas Public Utilities Commission and ERCOT are asking that people help conserve energy Sunday through Tuesday.
They are asking Texans to turn the thermostat to 68 or lower, close shades and blinds, unplug non-essential items, and avoid using large appliances like a dishwasher or laundry during peak times, when it is coldest.
Officials said they have maxed out the amount of energy they can supply the grid, and are now asking for people to chip in with conservation efforts to avoid outages.