Regulations to kill the zeroemission myth

COVID-19 Impact on U.S. Power Demand shows falling electricity load, lower wholesale prices, and resilient utilities in competitive markets, with regional differences tied to weather, renewable energy, stay-at-home orders, and hedging strategies.

Key Points

It outlines reduced load and prices, while regulatory design and hedging support utility stability across regions.

✅ Load down in NY, New England, PJM; weather drives South up.

✅ Wholesale prices fall 8-10% in key markets.

✅ Decoupling, contracts, hedging support utility earnings.

On March 27, Bloomberg New Energy Finance (BNEF) released a report on electricity demand and wholesale market prices impact from COVID-19 fallout. The model compares expected load based largely on weather with actual observed electricity demand changes.

So far, the hardest hit power grid is New York, with load down 7 and prices off by 10 percent. That’s expected, given New York City is the current epicenter of the US health crisis.

Next is New England, with 5 percent lower demand and 8 percent reduced wholesale prices for the week from March 19-25. BNEF says the numbers could go higher following advisories and orders issued March 24 for some 70 percent of the region’s population to stay at home.

Demand on the biggest grid in the US, the PJM (Pennsylvania/Jersey/Maryland), is 4 percent lower, with prices dropping 8 percent, as recent capacity auction payouts fell sharply. BNEF believes there will be more impact as stay at home orders are ramped up in several states.

California’s power demand for March 19-25 was 5 percent below what BNEF’s model expects without COVID-19 impact. That reflects a full week of stay-at-home orders from Governor Newsom issued March 19.

Health officials in Los Angeles and elsewhere expect a spike in COVID-19 cases in coming weeks. But BNEF’s model now actually projects rising electricity load for the state, due to what it calls "freakishly mild weather a year ago."

Rounding out the report, power demand is up for a band of southern states stretching from Florida to the desert Southwest, with weather more than offsetting public response to COVID-19 so far. BNEF says the Northwest’s grid "has not yet been highly impacted," while the Southeast is "generally in line" with pre-virus expectations.

Clearly, all of this data can change quickly and radically. Only California and New York are currently in full shutdown mode. Following them are New England (70 percent), the Midwest (65 percent), Texas (50 percent), PJM (50 percent) and the Northwest (50 percent).

In contrast, only small parts of Florida, the Southeast and Southwest are restricting movement. That could mean a big future increase for shut-ins, with heightened risks of electricity shut-offs that burden households and a corresponding impact on power demand.

Also, weather will play a major role on what happens to actual electricity demand, just as it always does. A very hot summer, for example, could offset virus-related shut-ins, just as it apparently is now in states like Texas. And it should be pointed out that regions vary widely by exposure to recession-sensitive sources of demand, such as heavy industry.

Most important for investors, however, is the built in protection US utility earnings enjoy from declining power demand, even amid broader energy crisis pressures facing the sector. For one thing, US power grids in California, ERCOT (Texas), MISO (Midwest), New England, New York and PJM have wholesale power markets, where producers compete for sales and the lowest bidder sets the price.

In those states, most regulated utilities don’t produce power at all. In fact, companies’ revenue is decoupled entirely from demand in California, as well as much of New England. In the roughly three-dozen states where utilities still operate as integrated monopolies, demand does affect revenue, and in many regions flat electricity demand already persists. But the cost of electricity is passed through directly to customers, whether produced or purchased.

A number of US electric companies have invested in renewable energy facilities as part of broader electrification trends nationwide. These sell their output under long-term contracts primarily with other utilities and government entities.

This isn’t a risk free business: For the past year, generators selling electricity to bankrupt PG&E Corp (PCG) have had their cash trapped at the power plant level as surety for lenders. But even PG&E has honored its contracts. And with states continuing aggressive mandates for renewable energy adoption, growth doesn’t appear at risk to COVID-19 fallout either.

The wholesale price of power from natural gas, coal and many nuclear plants was already sliding before COVID-19, due to renewables adoption and low natural gas prices, even as coal and nuclear disruptions raise reliability concerns. But here too, big producers like Exelon Corp (EXC) and Vistra Energy (VST) have employed aggressive price hedging near term, with regulated utilities and retail businesses protecting long-term health, respectively.

Bottom line: It’s early days for the COVID-19 crisis and much can still change. But so far at least, the US power industry is absorbing the blow of reduced demand, just as it’s done in previous crises.

That means future selloffs in the ongoing bear market are buying opportunities for best in class electric utilities, not a reason to sell. For top candidates, see the Conrad’s Utility Investor Portfolios and Dream Buy List in the March issue. 

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Heathrow Airport Power Outage 2025 disrupted operations with mass flight cancellations and diversions after a grid failure, exposing infrastructure resilience gaps, crisis management flaws, and raising passenger compensation and safety oversight concerns.

Key Points

A grid failure closed Heathrow, causing mass cancellations and diversions, exposing resilience and communication lapses.

✅ Grid fire triggered airport-wide shutdown

✅ 1,400+ flights canceled or diverted

✅ Inquiry probes resilience, communication, compensation

On March 21, 2025, Heathrow Airport, Europe's busiest, suffered a catastrophic power outage, similar to another high-profile outage seen at major events, that led to the cancellation and diversion of over 1,400 flights, affecting nearly 300,000 passengers and costing airlines an estimated £100 million. The power failure, triggered by a fire at an electricity substation in west London, left Heathrow with a significant operational crisis. This disruption is even more significant considering that Heathrow is one of the most expensive airports globally, which raises concerns about its infrastructure resilience and broader electricity system resilience across Europe.

In a parliamentary committee meeting, Heathrow officials admitted that vulnerabilities in the airport’s power supply were flagged just days before the outage. Nigel Wicking, Chief Executive of the Heathrow Airline Operators' Committee (HAOC), informed MPs that concerns regarding power resilience had been raised on March 15, following disruptions caused by cable thefts impacting runway lights. Despite these warnings, the airport’s management did not address the vulnerabilities urgently, even as UK net zero policies continue to reshape infrastructure planning, which ultimately led to the disastrous outage.

The airport was closed for a day, with serious consequences for not only airlines but also the surrounding community and businesses. British Airways alone faced millions of pounds in losses, and passengers experienced significant emotional distress, missing vital life events like weddings and funerals due to flight cancellations. The committee is now questioning officials from National Grid and Scottish and Southern Electricity Networks to better understand why Heathrow’s infrastructure failed, in the context of a cleaner grid following the British carbon tax that reduced coal use, how it communicated with affected parties, and what measures will be taken to compensate impacted passengers.

Heathrow’s Chief Executive, Thomas Woldbye, defended the closure decision, stating it would have been disastrous to keep the airport open under such circumstances. He noted that continuing operations would have left tens of thousands of passengers stranded and would have posed safety risks due to the failure of fire surveillance and CCTV systems. However, Wicking, representing the airlines, pointed out that Heathrow’s lack of resilience was unacceptable given the amount spent on the airport, emphasizing the need for better infrastructure, including addressing SF6 in switchgear during upgrades, and more transparent management practices.

Looking forward, the MPs intend to investigate the airport’s emergency preparedness, why the resilience review from 2018 wasn’t shared with airlines, and whether enough preventative measures were in place amid surging data demand that could strain electricity supplies. The outcome of this inquiry could have lasting effects on how Heathrow and other major airports handle their infrastructure and crisis management systems, as drought-driven hydro challenges demonstrate the wider climate stresses on power networks.

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Hydro One COVID-19 Quarantine Support connects Ontario's Ministry of Health with trained customer service teams to contact travellers, encourage self-isolation, explain quarantine rules, and share public health guidance to slow community transmission.

Key Points

Hydro One helps Ontario's MOH contact travellers and guide self-isolation for quarantine compliance.

✅ Trained agents contact returning travellers in Ontario

✅ Guidance on self-isolation, symptoms, and quarantine compliance

✅ Supports public health while freeing front-line resources

Hydro One Networks Inc. ("Hydro One") announced support to the Ministry of Health (MOH) with its efforts in contacting travellers entering Ontario to ensure they comply with Canada's mandatory quarantine measures to combat COVID-19. Hydro One has volunteered employees from its customer service operations to contact thousands of returning travellers to provide them with timely guidance on how to self-isolate and spot the symptoms of the virus to help stop its spread.

"Our team is ready to lend a helping hand and support the province to help fight this invisible enemy," said Mark Poweska, President and CEO, Hydro One. "Our very dedicated customer service staff are highly professional and will be a valuable resource in supporting the province as it works to keep Ontarians safe and slow the spread of COVID-19."

"We have seen a tremendous response from all our companies across Ontario to help us fight the COVID-19 outbreak. With this one, Hydro One is helping the province to remind Ontarians they need to stay safe at home, especially self-isolating customers throughout Ontario," said Christine Elliott, Deputy Premier and Minister of Health. "We thank them for stepping up to be part of the fantastic province-wide effort acting together and allowing our front line workers to focus their efforts where they are needed most during this challenging time."

"We are pleased to see Hydro One volunteer its resources and expertise to support in the fight against COVID-19," said Greg Rickford, Minister of Energy, Northern Development and Mines. "In these unprecedented times, I am proud to see leaders in the energy sector rise to the challenge, from restoring power after major storms to supporting the people of our province."

Hydro One and its employees play a critical role in maintaining Ontario's electricity system. Since the COVID-19 outbreak began, Hydro One has been monitoring the evolving situation and adapting its operations, including on-site lockdowns for key staff as needed to ensure it continues to deliver the service Ontarians depend on while keeping our employees, customers and the public safe.

Hydro One has also developed a number of customer support measures during COVID-19, including a new Pandemic Relief Fund to offer payment flexibility and financial assistance to customers experiencing financial hardship, suspending late payment fees and returning approximately $5 million in security deposits to businesses across Ontario.

"Customers are counting on us now more than ever – not only to keep the lights on across the province, but to offer support during this difficult time," said Poweska. "Hydro One will continue to collaborate with industry partners and the province, including mutual aid assistance with other utilities, to find new ways to offer support where it is needed."

More information about how Hydro One is supporting its customers, including its ban on disconnections and other measures, can be found at www.HydroOne.com/PandemicRelief .

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Taltson Hydro Electric Heating directs surplus hydro power in the South Slave to space heat via discounted rates, displacing diesel and cutting greenhouse gas emissions, with rebates, separate metering, and backup systems shaping adoption.

Key Points

An initiative using Taltson's surplus hydro to heat buildings, discount rates replace diesel and cut emissions.

✅ 6.3 cents/kWh heating rate needs separate metering, backup heat

✅ 4-6 MW surplus hydro; outages require diesel; rebates available

✅ Program may be curtailed if new mines or mills demand power

A Northwest Territories green energy advocate says there's an obvious way to expand demand for electricity in the territory's South Slave region without relying on new mining developments — direct it toward heating.

One of the reasons the N.W.T. has always had some of the highest electricity rates in Canada is that a small number of people have to shoulder the huge costs of hydro facilities and power plants.

But some observers point out that residents consume as much energy for heat as they do for conventional uses of electricity, such as lighting and powering appliances. Right now almost all of that heat is generated by expensive oil imported from the United States.

The Northwest Territories Power Corporation says the 18-megawatt Taltson hydro system that serves the South Slave typically has four to six megawatts of excess generating capacity, even as record demand in Yukon is reported. It says using some of that to generate heat is a government priority.

But renewable energy advocate and former N.W.T. MP Dennis Bevington, who lives in the South Slave and heats his home using electricity, says the government is not making it easy for people to tap into that surplus to heat their homes and businesses, a debate that some say would benefit from independent planning at the national level.

Discount rate for heating, but there are catches
The power corporation offers hydro electricity from Taltson to use for heating at a much lower price than it charges for electricity generally. The discounted rate is not available to residential customers.

According to the corporation, consumers pay only 6.3 cents per kilowatt hour compared to the regular rate of just under 24 cents, while Manitoba Hydro financial pressures highlight the risks of expanding demand without new generation.

But to distinguish between the two, users are required to cover the cost of installing a separate power meter. Bevington, who developed the N.W.T.'s first energy strategy, says that is an unnecessary expense.

Taltson expansion key to reducing N.W.T.'s greenhouse gas emissions, says gov't
"The billing is how you control that," he said. "You establish an average electrical use in the winter months. That could be the base rate. Then, if you use power in the winter months above that, you get the discount."

Users are also required to have a back-up heating system. Taltson hydro power offers heating on the understanding that when the hydro system is down — such as during power outages or annual summer maintenance of the hydro system — electricity is not available for heating.
The president and CEO of the power corporation says there's a good reason for that. "The diesels are more expensive to run and they're actually greenhouse gas emitting," said Noel Voykin. "The whole idea of this [electric heat] program is to provide clean energy that is not otherwise being used."

According to the corporation, there have been huge savings for the few who have tapped into the hydro system to heat their buildings, and across Canada utilities are exploring novel generation such as NB Power's Belledune seawater project to diversify supply.

It's being used to heat Aurora College's Breynat Hall, and Joseph B. Tyrrell Elementary School and the transportation department garage in Fort Smith, N.W.T. Electricity is also used to heat the Jackfish power plant in the North Slave region.

The corporation says that during a four-year period, this saved more than 600,000 litres of diesel fuel and reduced greenhouse gas emissions by about 1,700 tonnes.

Bevington says the most obvious place to expand the use of electrical heat is to government housing.

"We have a hundred public housing units in Fort Smith," he said. "The government is putting diesel into those units [for heating] and they could be putting in their own electricity."

Heating a tiny part of energy market
The corporation says it sells only about 2.5 megawatts of electricity for heating each year, which is less than four per cent of the power it sells in the region. It says with some upgrades, another two megawatts of electricity could be made available for electrical heat.

Bevington says the corporation could do more to market electricity for heating. Voykin said that's the government's job. There are three programs that offer rebates to residents and businesses converting to electric heating.

If you build it, will they come? N.W.T. gov't hopes hydro expansion will attract investment
There are better options than billion dollar Taltson expansion, say energy leaders
There may be a reason why the government and the corporation are not more aggressively promoting using surplus electricity in the Taltson system for heating, as large hydro ambitions have reopened old wounds in places like Quebec and Newfoundland and Labrador during recent debates.

It is anticipating that new industrial customers may require that excess capacity in the coming years, and experiences elsewhere show that accommodating new energy-intensive customers can be challenging for utilities. Voykin said those potential new customers include a proposed mine at Pine Point and a pellet mill in Enterprise, N.W.T., even as biomass use faces environmental pushback in some regions.

The corporation says any surplus power in the system will be sold at standard rates to any new industrial customers instead of at discount rates for heating. If that requires cutting back on the heating program, it will be cut back.

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EasyPower Webinars deliver expert training on electrical power systems, covering arc flash, harmonics, grounding, overcurrent coordination, NEC and IEEE 1584 updates, with on-demand videos and email certificates for continuing education credits.

Key Points

EasyPower Webinars are expert-led power systems trainings with CE credit details and on-demand access.

✅ Arc flash, harmonics, and grounding fundamentals with live demos

✅ NEC 2020 and IEEE 1584 updates for compliance and safety

✅ CE credits with post-webinar email documentation

We've ramped up webinars to help your learning while you might be working from home, and similar live online fire alarm training options are widely available. As usual, you will receive an email the day after the webinar which will include the details most states need for you to earn continuing education credit, amid a broader grid warning during the pandemic from regulators.

EasyPower's well known webinar series covers a variety of topics regarding electrical power systems. Below you will see our webinars scheduled through the next few months, reflecting ongoing sector investments in the future of work across the electricity industry.

In addition, there are more than 150 videos that were recorded from past webinars in our EasyPower Video Library. The topics of these videos include arc flash training, short circuit, protective device coordination, power flow, harmonics, DC systems, grounding, and many others.

AUGUST WEBINARS

Active & Passive Harmonic Filters in EasyPower

By Tao Yang, Ph.D, PE, at EasyPower

In this webinar, Tao Yang, Ph.D, PE, from EasyPower provides a refresher course on fundamental concepts of harmonics study and the EasyPower Harmonics module. He describes the two major harmonics filters, both active and passive, and their implementation in the EasyPower Harmonics module. As passive filters are widely used in the industry, he covers four kinds of typical passive filters: notch, first order, second order, and C-type filters, including their implementation in EasyPower and their tuning processes. He uses live examples to demonstrate the modeling and parameter tuning for both active and passive filters using simple EasyPower cases.

Date: Thursday, August 13, 2020
Time: 10:00 AM - 11:00 AM Pacific
Register: https://attendee.gotowebinar.com/register/1359680676441129997

Cracking the Code for Arc-Flash Mitigation

By Mark Pollock at Littelfuse

The National Electrical Code (NEC) outlines several arc-flash mitigation options, aligning with broader arc flash training insights across the industry. This presentation, given by Mark Pollock at Littelfuse, reviews the arc-flash mitigation options from the NEC 2020, and some updates to the IEEE 1584-2018 standard. In addition to understanding the codes, we’ll discuss the return on investment for the various mitigation options and the importance of arc-flash assessments in your facility. 

Date: Thursday, August 20, 2020
Time: 10:00 AM - 11:00 AM Pacific
Register: https://attendee.gotowebinar.com/register/107117029724512527

Ground Fault Coordination in EasyPower

By Jim Chastain, Support Engineer at EasyPower

The PowerProtector™ module in EasyPower simplifies the process of coordinating protective devices. In this refresher webinar, Jim Chastain demonstrates the procedure to coordinate ground fault protection for both resistance-grounded and hard-grounded systems.

Date: Tuesday, August 25, 2020
Time: 8:00 AM - 8:30 AM Pacific
Register: https://attendee.gotowebinar.com/register/561389055546364429

SEPTEMBER WEBINARS

Overcurrent Coordination and Protection Basics

By James Onsager and Namrata Asarpota at S&C Electric

Coordination of overcurrent protective devices is necessary to limit interruptions to the smallest portion of the power system in the event of an overload or short-circuit. This webinar, given by James Onsager and Namrata Asarpota at S&C Electric, goes over the basics of Time Current Curves (TCCs), types of overcurrent protective devices (for both low-voltage and medium-voltage systems), and how to coordinate between them. Protection of common types of equipment such as transformers, cables and motors according the National Electrical Code (NFPA 70, NEC) is also discussed, alongside related fire alarm training online resources available to practitioners. 

Date: Thursday, September 3, 2020
Time: 10:00 AM -11:00 AM Pacific
Register: https://attendee.gotowebinar.com/register/6345420550218629133

Static Discharge Awareness and Explosion Protection

By Christopher Coughlan at Newson Gale, a Hoerbiger Safety Solutions Company

For any person responsible for the safety of employees, colleagues, plant equipment and plant property, one of the most potentially confusing aspects of providing a safe operating environment is understanding and safeguarding again static discharge, with industry leadership in worker safety highlighting best practices. In this webinar given by Christopher Coughlan at Newson Gale, a Hoerbiger Safety Solutions Company, he discusses how to determine if your site’s manufacturing or handling processes have the potential to discharge static sparks into flammable or combustible atmospheres. 

Date: Thursday, September 17, 2020
Time: 10:00 AM -11:00 AM Pacific
Register: https://attendee.gotowebinar.com/register/7225333317600833296

XGSLab New Feature - Seasonal Analysis For Grounding Systems

By David Lewis, P.E, Electrical Engineer, Grounding and Power Systems at EasyPower

In regions where the frost depth meets or exceeds the depth of a grounding system, the grounding system’s performance may be dramatically reduced, possibly creating hazardous conditions. The latest XGSLab release 9.5 provides a powerful new tool to analyze grounding system performance that considers the seasonal variation in soil characteristics. In this webinar, given by David Lewis, an electrical engineer at EasyPower, we describe the effect that seasonal variation can have on a grounding system and we step you through the use of the Seasonal Analysis tool. 

Date: Tuesday, September 25, 2020
Time: 8:00 AM -8:30 AM Pacific
Register: https://attendee.gotowebinar.com/register/6805488101896212751

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Texas Power Grid Crisis strains ERCOT as extreme cold, ice storms, and heavy snow trigger rolling blackouts, load shedding, and boil-water notices, leaving millions without electricity while frozen turbines and low gas pressure hinder generation.

Key Points

A statewide emergency of outages and boil-water notices as ERCOT battles extreme cold and load shedding.

✅ Millions without power; ERCOT orders load shedding

✅ Boil-water notices in Austin, Houston, Fort Worth

✅ Frozen equipment, low gas pressure, extreme cold disrupt supply

Nearly 3 million homes and businesses in Texas remain without power, some for a third consecutive day, as severe winter weather continues to pummel the state, forcing some localities to issue boil-water notices and urge residents to reduce their electricity usage.

Heavy snowfall, ice storms and bitter temperatures continue to put an enormous strain on the state's power grid. This as the Electric Reliability Council of Texas (ERCOT), which manages roughly 75% of the Texas power grid, announced Wednesday morning that some 600,000 households had power restored overnight.

That still left another 2.7 million customers having to endure extreme cold with no indication of when the thaw would break in their homes.

"We know millions of people are suffering," ERCOT's president and CEO, Bill Magness, said in a statement Wednesday. "We have no other priority than getting them electricity. No other priority."

ERCOT also said Wednesday that it was urging local utilities to shed some 14,000 megawatts of load, which translates to roughly 2.8 million customers, to prepare for a sudden increase in demand.

"The ability to restore more power is contingent on more generation coming back online," said Dan Woodfin, the senior director of ERCOT's system operations, and utility supply-chain constraints can further complicate repair timelines for some utilities.

He said that about 185 generating units were offline, stemming from a range of factors including frozen wind turbines, low gas pressure and frozen instrumentation.

But many Texans feel abandoned by the council and power companies and they are lashing out at the local face of utilities.

The City of Austin's community-owned electric utility, Austin Energy, issued a tweet saying crews that are working to restore power are facing harassment.

"Our crews have been working 24/7 and in these elements," Austin Energy announced. "Some of our crews are reporting incidents of harassment, threatening them and even throwing things at them."

Officials pleaded with the public to remain calm. "I know people are extremely frustrated. But please, I bet of you, do not approach AE crews."

Parts of Austin are under a boil water notice, which Austin Water Director Greg Meszaros attempted to explain during a press briefing Wednesday afternoon.

"There was a large main break in that area, maybe multiple ones. We're seeing main breaks and pipes bursting by the tens of thousands. Our entire system is under stress," Meszaros said.

It's not just the Lone Star State that is being crippled by the arctic blast, with a deep freeze slamming the energy sector across the country.

At least two dozen people have died this week from weather-related incidents, according to The Associated Press.

The National Weather Service reports that more than 100 million Americans are being affected by extreme winter weather from the south central U.S. to the East Coast, including Arkansas, Louisiana, Mississippi, North Carolina, Virginia and West Virginia, and analysts warn of blackout risks nationwide during extreme heat as well.

The National Weather Service adds that cold temperatures over the nation's heartland will begin to "moderate in the coming days" but that many parts will remain 20 to 35 degrees below normal in the Great Plains, Mississippi Valley and lower Great Lakes region.

"Potential is increasing for significant icing across portions of the Mid-Atlantic, which will be very impactful, especially for those hardest hit from the previous ice storm," the National Weather Service tweeted Wednesday.

Texas Gov. Greg Abbott railed against ERCOT, and Elon Musk criticized the agency as unreliable, saying the utility "has been anything but reliable over the past 48 hours."

"This is unacceptable," Abbott added, as residents were facing rotating intentional power outages. The governor issued an executive order that will add reforms for how the power grid is managed, including grid reliability improvements under discussion, as an emergency legislative item for the state legislature to review.

The rolling power outages forced Fort Worth to extend a boil-water notice for roughly 212,000 residents. Officials said the outages affected the city's systems that both treat water and move it to customers.

Fort Worth officials said nine other localities that purchase water from the city are also affected, including Haslet, Keller, Lake Worth and Northlake.

Officials in Houston also issued a boil-water notice for the city's residents Wednesday.

"Do not drink the water without boiling it first," Houston Public Works said from its official Twitter account. "Bring all water to a boil for at least two minutes. Let it cool before using."

In Harris County, which includes Houston, Judge Lina Hidalgo warned residents about extended power outages.

"Let me give it to you straight, based on the visibility I have: Whether you have power or not right now, there is a possibility of power outages even beyond the length of this weather," Hidalgo said, according to Houston Public Media.

The NPR member station adds that county officials have also reported more than 300 cases of carbon monoxide poisoning since Monday as residents going without electricity search desperately for alternative sources of warmth.

"In no uncertain terms, this is a public health disaster and a public health emergency," Samuel Prater, an emergency physician at Memorial Hermann-Texas Medical Center, said at a news briefing Tuesday.

Prater warned residents that over the last 24 hours, emergency officials "have seen a striking increase in the number of cases related to improper heating sources," including indoor use of generators, charcoal grills, campfire stoves and other devices that are being used to warm homes. The result, he added, is carbon monoxide poisoning of entire families.

"If you think you or a loved one has become ill from carbon monoxide poisoning, first thing you need to do is get outside to fresh air," Prater said.

A woman and an 8-year-old girl are among those who have reportedly died from carbon monoxide poisoning after a vehicle was left running inside a garage in an attempt to generate heat, according to Houston's ABC affiliate.

As Texas endures further weather-related issues, including road and highway closures, there's a renewed focus on how the Texas power grid has failed, and why the grid is facing another crisis amid this prolonged cold.

The Texas electrical grid is "facing conditions that it was not designed for," said Emily Grubert, a professor at Georgia Tech whose expertise includes electric networks.

"These are really extreme conditions for the Texas grid. It's very cold. It's cold across the entire state, and it's cold for a long time. This does not happen very often," she said in an interview with NPR's Morning Edition.

"Demand really spiked both in the electricity and the natural gas systems at the same time as a lot of the generators were not able to operate because of those cold conditions, and not being prepared for it is really what's going on," Grubert said. "But a lot of grids are susceptible to really, really major failures when they are this far outside of design conditions."

Abbott told Fox News on Tuesday that with weather-related shutdowns in wind and solar energy, which account for more than 10% of the state's grid, renewable energy is partly to blame for the Texas power crisis, even as he later touted the grid's readiness heading into the fall.

"It just shows that fossil fuel is necessary for the state of Texas as well as other states to make sure that we'll be able to heat our homes in the wintertime and cool our homes in the summertime," Abbott said.

But Grubert said that "coal, gas and nuclear actually shut down because of the extreme cold due to things like instruments freezing, et cetera. So I think the overall point here is all of the fuels were really, really struggling."

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