Fact checked by Vikki Velasquez
Reviewed by Doretha Clemon
Flip on a light, toast a bagel, crank up the heat: Most of us take for granted the electricity running things in our daily lives and never think about the national power grid that delivers energy to our homes.
With the possible exception of Texans.
Key Takeaways
- Texas opted for its own power grid at the turn of the 20th to the 21st century.
- Natural gas and wind generate most of Texas’s electricity and its infrastructure wasn’t winterized against freezing temperatures, leading to the 2021 winter blackout.
- Diversifying its energy sources beyond natural gas and wind, as well as winterizing and updating the grid, could help the state avoid future blackouts.
Power by Texans, for Texans
The U.S. power grid is divided into three sections: One serves the west, another the east, and the final portion is reserved for the state of Texas—power generated by Texans, for Texans.
You may have heard about the state’s energy problems after a massive ice storm hit in February 2021. Temperatures plummeted, and as people flipped on heaters to stay warm, the surge in demand surpassed Texas’s capacity to generate electricity, and parts of the state went dark—for days.
Why Is Texas on Its Own?
At the turn of the 20th century, states saw power as a necessity and began regulating companies to ensure energy was provided equitably. Regulations were established covering which companies could sell electricity and how much they could charge. Texas, seeking to avoid federal and interstate rules, opted out. Instead, the state’s power companies merged to create bigger companies and share power without exporting any over state lines.
Other states saw this as a good idea, but they couldn’t generate enough energy to reliably serve their residents. Texas was different because of its size: It covers two time zones, meaning some parts of the state require peak power an hour later than the rest of the state, and some parts throttle demand back an hour earlier than other parts. This permits Texas’s power authority, the Electric Reliability Council of Texas (ERCOT), to produce sufficient energy for its customers. ERCOT produces power for 90% of the population, with other states’ grids providing the rest.
Why Did the Grid Perform So Poorly in the Storm?
In Texas, just over 44% of the power comes from natural gas-powered steam generators. Another approximately 25% is generated by wind turbines.
Natural gas wells and wind turbines weren’t weatherized in Texas’s normally mild climate. So when winter ice storm Uri hit the state, these sources mostly failed. Texas’s power demand usually peaks during hot summers, with minimal need for heating during mostly mild winters. But during the 2021 winter storm, residents stayed home, pushing demand beyond the already diminished capacity.
The state wasn’t prepared for the massive storm and falling temperatures. The ice and cold left 4.5 million Texan homes without electricity for days and property damage was estimated up to $20 billion.
Has Texas Solved Its Grid Problem?
Texas passed a law in June 2021 to reform the Electric Reliability Council of Texas (ERCOT) and to weatherize and improve the state’s power grid. The law mandated the weatherization of power generator, natural gas, and transmission facilities, so that they can withstand the impact of extreme weather conditions. Penalties of $1 million could be imposed if the requirements were not met. ERCOT was also required to procure additional power sources.
Despite these weatherization efforts, however, the Texas power grid is still vulnerable. According to ERCOT’s January 2025 Monthly Outlook for Resource Adequacy (MORA), there’s an 80% risk of rolling blackouts if a storm with the force of Uri were to hit Texas in winter 2025. Even a milder storm could cause a 50% risk of blackouts. Electricity demand has continued to grow since 2021, and Texas doesn’t have enough natural gas, coal, and nuclear power plants, as well as long duration batteries, to provide adequate power during winter cold spells, according to Ed Hirs, an energy fellow at the University of Houston. ERCOT’s rate of unplanned power plant outages is the highest in the nation.
Hirs argues that the fix for the system lies not in grid upgrades, but in the Texas legislature. Writing in Forbes, he notes, “Texas replaced its reliable end-to-end electricity supply chain with a severely fragmented system that is 100% government operated. No one can be held accountable. It is exactly like a government bureau out of the old Soviet Union down to its antiquated, computer driven input-output algorithm.” Meanwhile, ERCOT forecasts that energy demand will nearly double by 2030, driven by the need to power AI data centers, crypto mining facilities, hydrogen production plants, and oil and gas companies.
Why Is Texas the Only State With Its Own Power Grid?
Texas wasn’t the only state that wanted to regulate its own power generation, but Texas had the size to pull it off. Straddling two time zones, peak electric use is staggered—people in the eastern portion are turning off lights to go to bed an hour earlier than those in the west and turning lights back on an hour earlier. This permits some evening of demand and helps the state provide enough power in ordinary circumstances.
What Caused the February 2021 Blackouts?
A confluence of circumstances led to power being cut to millions of residents over several days. The first was an unusual winter ice storm, which caused temperatures to plummet and energy demand to soar as people sought to keep their homes warm. Second, the state’s gas and wind supplies hadn’t been winterized—the systems weren’t built for severe winter weather and failed to function in the ice and freezing temperatures.
What Changes Were Required Under the 2021 Texas Laws to Restore the Grid?
The main change was the weatherization of power generation facilities, natural gas facilities, and transmission facilities to handle extreme weather. Failure to weatherize those facilities could result in a penalty of up to one million dollars. The laws also mandated a “Power Outage Alert” where Texans receive an emergency alert whenever the power supply in the state may be inadequate to meet demand. And they established the Texas Energy Reliability Council to improve coordination between state agencies and industry during extreme weather emergencies and extended power outages.
The Bottom Line
In 2002, Texas replaced its end-to-end electricity supply chain with a government-operated grid for which consumers pay more and get less, Hirs says. With high-demand businesses such as new AI data centers and crypto currency mining facilities being built in the state, major investments are needed in the grid system to supply the required power, and equitable ways to pay for those investments need to be found. Given the ongoing vulnerability of the Texas power grid, it’s impossible to rule out power outages in the state caused by weather or some other event.