Extreme energy demand and overloaded frozen utility plants amid an unprecedented deep freeze in Texas are among the factors that led to nearly 4.5 millions customer without power in the Lone Star State on Tuesday, experts say.
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Outages spread across Texas left millions in the dark and bitter cold amid single-degree temperatures and a winter storm that buried the state in snow and ice in recent days.
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Power outages across Texas
“No matter which way you cut it, this is a massive failure for a grid and a state that holds up energy and electricity as a shining example,” said Varun Rai, the director of the Energy Institute at the University of Texas at Austin.
During a Tuesday press conference, representatives from the Electric Reliability Council of Texas (ERCOT), said there are 45,000 megawatts offline. Of that, 15,000 megawatts are wind and 30,000 are gas and coal. Between two and three million customers were without power as of early Tuesday evening.
45,000 megawatts of power offline in Texas
ERCOT, which manages about 90% of the state’s power for 26 million customers, has said it is instituting rolling outages across the system to prevent more outages as it worked to restore power for Texans.
Gov. Greg Abbott called the situation “unacceptable” and said he would be adding an emergency item to the state’s legislative session on reforming ERCOT. The non-profit corporation is subject to oversight from the Public Utility Commission of Texas and the Texas Legislature.
“Far too many Texans are without power and heat for their homes as our state faces freezing temperatures and severe winter weather,” Abbott said.
States with power outages
Why is Texas having power outages, rolling blackouts?
Daniel Cohan, an associate professor of civil and environmental engineering at Rice University, said that, at the most basic level, the outages have been caused because demand amid the bitter cold has outpaced supply of energy that is used to heat and power homes.
Why is it so cold? How the polar vortex brings record low temperatures and winter storms
A combination of mostly natural gas, some coal and a nuclear power plant failed to meet up with the demand that customers had, Cohan said.
Texas net electricity generation
According to ERCOT, supply fell short by about 34,000 megawatts (MW) of energy. For comparison, ERCOT said that when it restored 2,500 MW on Monday, that was enough power to serve 500,000 households.
Cohan said three different factors were likely at play, though it’s too soon to say to what degree each played a role in causing the outages.
