AEP coal-plant construction faces new hurdles

London Underground Power Outage 2025 disrupted Tube lines citywide, with a National Grid voltage dip causing service suspensions, delays, and station closures; TfL recovery efforts spotlight infrastructure resilience, contingency planning, and commuter safety communications.

Key Points

A citywide Tube disruption on May 12, 2025, triggered by a National Grid voltage dip, exposing resilience gaps.

✅ Bakerloo, Waterloo & City, Northern suspended; Jubilee disrupted.

✅ Cause: brief National Grid fault leading to a voltage dip.

✅ TfL focuses on recovery, communication, and resilience upgrades.

On May 12, 2025, a significant power outage disrupted the London Underground during the afternoon rush hour, affecting thousands of commuters across the city. The incident highlighted vulnerabilities in the city's transport infrastructure, echoing a morning outage in London reported earlier, and raised concerns about the resilience of urban utilities.

The Outage and Its Immediate Impact

The power failure occurred around 2:30 PM, leading to widespread service suspensions and delays on several key Tube lines. The Bakerloo and Waterloo & City lines were completely halted, while the Jubilee line experienced disruptions between London Bridge and Finchley Road. The Northern line was also suspended between Euston and Kennington, as well as south of Stockwell. Additionally, Elizabeth Line services between Abbey Wood and Paddington were suspended. Some stations were closed for safety reasons due to the lack of power.

Commuters faced severe delays, with many stranded in tunnels or on platforms. The lack of information and communication added to the confusion, as passengers were left uncertain about the cause and duration of the disruptions.

Cause of the Power Failure

Transport for London (TfL) attributed the outage to a brief fault in the National Grid's transmission network. Although the fault was resolved within seconds, it caused a voltage dip that affected local distribution networks, leading to the power loss in the Underground system.

The incident underscored the fragility of the city's transport infrastructure, particularly the aging electrical and signaling systems that are vulnerable to such faults, as well as weather-driven events like a major windstorm outage that can trigger cascading failures. While backup systems exist, their capacity to handle sudden disruptions remains a concern.

Broader Implications for Urban Infrastructure

This power outage is part of a broader pattern of infrastructure challenges facing London. In March 2025, a fire at an electrical substation in Hayes led to the closure of Heathrow Airport, affecting over 200,000 passengers, while similar disruptions at BWI Airport have underscored aviation vulnerabilities. These incidents have prompted discussions about the resilience of the UK's energy and transport networks.

Experts argue that aging infrastructure, coupled with increasing demand and climate-related stresses, poses significant risks to urban operations, as seen in a North Seattle outage and in Toronto storm-related outages that tested local grids. There is a growing call for investment in modernization and diversification of energy sources to ensure reliability and sustainability.

TfL's Response and Recovery Efforts

Following the outage, TfL worked swiftly to restore services. By 11 PM, all but one line had resumed operations, with only the Elizabeth Line continuing to experience severe delays. TfL officials acknowledged the inconvenience caused to passengers and pledged to investigate the incident thoroughly, similar to the Atlanta airport blackout inquiry conducted after a major outage, to prevent future occurrences.

In the aftermath, TfL emphasized the importance of clear communication with passengers during disruptions and committed to enhancing its contingency planning and infrastructure resilience.

Public Reaction and Ongoing Concerns

The power outage sparked frustration among commuters, many of whom took to social media to express their dissatisfaction, echoing sentiments during Houston's extended outage about communication gaps and delays. Some passengers reported being trapped in tunnels for extended periods without clear guidance from staff.

The incident has reignited debates about the adequacy of London's transport infrastructure and the need for comprehensive upgrades. While TfL has initiated reviews and improvement plans, the public remains concerned about the potential for future disruptions and the city's preparedness to handle them.

The May 12 power outage serves as a stark reminder of the vulnerabilities inherent in urban infrastructure. As London continues to grow and modernize, ensuring the resilience of its transport and energy networks will be crucial. This includes investing in modern technologies, enhancing communication systems, and developing robust contingency plans to mitigate the impact of future disruptions. For now, Londoners are left reflecting on the lessons learned from this incident and hoping for a more reliable and resilient transport system in the future.

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London, Ontario Power Outage disrupts the electricity grid, causing a citywide blackout, stalled commuters, dark traffic signals, and closed businesses, as London Hydro crews race restoration after a transformer malfunction and infrastructure failures.

Key Points

A blackout caused by a transformer malfunction, disrupting commuters, businesses, and traffic across London, Ontario.

✅ Traffic signals dark; delays and congestion citywide

✅ London Hydro crews repairing malfunctioning transformer

✅ Businesses closed; transit routes delayed and rerouted

A widespread power outage early Monday morning left thousands of residents in London, Ontario, without electricity, causing significant disruption for commuters and businesses at the start of the workday. The outage, which affected several neighborhoods across the city, lasted for hours, creating a chaotic morning as residents scrambled to adjust to the unexpected interruption.

The Outage Strikes

The power failure was first reported at approximately 6:30 a.m., catching many off guard as they began their day. The affected areas included several busy neighborhoods, with power lines down and substations impacted, issues that windstorms often exacerbate for utilities. Early reports indicated that the outage was caused by a combination of issues, including technical failures and possible equipment malfunctions. London Hydro, the city's primary electricity provider, responded quickly to the situation, assuring residents that crews were dispatched to restore power as soon as possible.

"Crews are on site and working hard to restore power to those affected," a spokesperson for London Hydro said. "We understand the frustration this causes and are doing everything we can to get the power back on as soon as possible."

Impact on Commuters and Businesses

The power outage had an immediate impact on the morning commute. Traffic lights across the affected areas were down, leading to delays and rush-hour disruptions at major intersections. Drivers were forced to navigate through intersections without traffic control, creating an additional layer of complexity for those trying to get to work or school.

Public transit was also affected, with some bus routes delayed due to the power loss at key transit stations. The situation added further stress to commuters already dealing with the challenges of a typical Monday morning rush.

Businesses in the affected neighborhoods faced a variety of challenges. Some were forced to close early or delay their opening hours due to a lack of electricity. Many shops and offices struggled with limited access to the internet and phone lines, which hindered their ability to process orders and serve customers. Local coffee shops, often a go-to for busy workers, were also unable to operate their coffee machines or provide basic services, forcing customers to go without their usual morning caffeine fix.

"For a lot of people, it's their first stop in the morning," said one local business owner. "It’s frustrating because we rely on power to function, and with no warning, we had to turn away customers."

The Response

As the hours ticked by, residents were left wondering when the power would return. London Hydro’s social media accounts were filled with updates, keeping residents informed about the restoration efforts, a practice echoed when BC Hydro crews responded during an atypical storm. The utility company urged those who were experiencing issues to report them online to help prioritize repair efforts.

"We are aware that many people are affected, and our teams are working tirelessly to restore power," the utility posted on Twitter. "Please stay safe, and we thank you for your patience."

Throughout the morning, the power was gradually restored to different areas of the city. However, some parts remained without electricity well into the afternoon, a situation reminiscent of extended outages that test city resilience. London Hydro confirmed that the outage was caused by a malfunctioning transformer, and the necessary repairs would take time to complete.

Long-Term Effects and Community Concerns

While the immediate effects of the outage were felt most acutely during the morning hours, some residents expressed concern about the potential long-term effects. The city’s reliance on a stable electricity grid became a focal point of discussion, with many wondering if similar outages could occur in the future, as seen in the North Seattle outage earlier this year.

"I understand that things break, but it’s frustrating that it took so long for power to come back," said a London resident. "This isn’t the first time something like this has happened, and it makes me wonder about the reliability of our infrastructure."

City officials responded by reassuring residents that efforts are underway to upgrade the city's infrastructure to prevent such outages from happening in the future. A report released by London Hydro highlighted ongoing investments in upgrading transformers and other key components of the city's power grid. Province-wide, Hydro One restored power to more than 277,000 customers after damaging storms, underscoring the scale of upgrades needed. Despite these efforts, however, experts warn that older infrastructure in some areas may still be vulnerable to failure, especially during extreme weather events or other unforeseen circumstances.

The morning outage serves as a reminder of how reliant modern cities are on stable electricity networks. While the response from London Hydro was swift and effective in restoring power, it’s clear that these types of events can cause significant disruptions to daily life. As the city moves forward, many are calling for increased investment in infrastructure and proactive measures to prevent future outages, especially after Toronto outages persisted following a spring storm in the region.

In the meantime, Londoners have adapted, finding ways to go about their day as best they can. For some, it’s a reminder of the importance of preparedness in an increasingly unpredictable world. Whether it’s an extra flashlight or a backup power source, residents are learning to expect the unexpected and be ready for whatever the next workday might bring.

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SDG7 Energy Progress Report assesses global energy access, renewables, clean cooking, and efficiency, citing COVID-19 setbacks, financing needs, and UN-led action by IEA, IRENA, World Bank, and WHO to advance sustainable, reliable, affordable power.

Key Points

A joint study by IEA, IRENA, UN, World Bank, and WHO tracking energy access, renewables, efficiency, and financing gaps.

✅ Tracks disparities in electricity access amid COVID-19 setbacks

✅ Emphasizes renewables, clean cooking, and efficiency targets

✅ Calls for scaled public finance to unlock private investment

The seventh Sustainable Development Goal (SDG), SDG7, aims to ensure access to affordable, reliable, sustainable and modern energy for all.  

However, those nations which remain most off the grid, are set to enter 2030 without meeting this goal unless efforts are significantly scaled up, warns the new study entitled Tracking SDG 7: The Energy Progress Report, published by the International Energy Agency (IAE), International Renewable Energy Agency (IRENA), UN Department of Economic and Social Affairs (UN DESA), World Bank, and World Health Organization (WHO). 

“Moving towards scaling up clean and sustainable energy is key to protect human health and to promote healthier populations, particularly in remote and rural areas”, said Maria Neira, WHO Director of the Department of Environment, Climate Change and Health.  

COVID setbacks 
The report outlines significant but unequal progress on SDG7, noting that while more than one billion people globally gained access to electricity over the last decade, COVID’s financial impact so far, has made basic electricity services unaffordable for 30 million others, mostly in Africa, intensifying calls for funding for access to electricity across the region.  

“The Tracking SDG7 report shows that 90 per cent of the global population now has access to electricity, but disparities exacerbated by the pandemic, if left unaddressed, may keep the sustainable energy goal out of reach, jeopardizing other SDGs and the Paris Agreement’s objectives”, said Mari Pangestu, Managing Director of Development Policy and Partnerships at the World Bank. 

While the report also finds that the COVID-19 pandemic has reversed some progress, Stefan Schweinfest, DESA’s Director of the Statistics Division, pointed out that this has presented “opportunities to integrate SDG 7-related policies in recovery packages and thus to scale up sustainable development”. 

Modernizing renewables 
The publication examines ways to bridge gaps to reach SDG7, chief among them the scaling up of renewables, as outlined in the IRENA renewables report, which have proven more resilient than other parts of the energy sector during the COVID-19 crisis. 

While sub-Saharan Africa, facing a major electricity challenge, has the largest share of renewable sources in its energy supply, they are far from “clean” – 85 per cent use biomass, such as burning wood, crops and manure. 

“On a global path to achieving net-zero emissions by 2050, we can reach key sustainable energy targets by 2030, aligning with renewable ambition in NDCs as we expand renewables in all sectors and increase energy efficiency”, said IAE Executive Director, Fatih Birol.  

And although the private sector continues to source clean energy investments, the public sector remains a major financing source, central in leveraging private capital, particularly in developing countries, including efforts to put Africa on a path to universal electricity access, and in a post-COVID context. 

Amid the COVID-19 pandemic, which has dramatically increased investors’ risk perception and shifting priorities in developing countries, international financial flows in public investment terms, are more critical than ever to underpin a green energy recovery that can leverage the investment levels needed to reach SDG 7, according to the report.   

“Greater efforts to mobilize and scale up investment are essential to ensure that energy access progress continues in developing economies”, he added.  

Scaling up clean and sustainable energy is key to protect human health -- WHO's Maria Neira

Other key targets 
The report highlighted other crucial actions needed on clean cooking, energy efficiency and international financial flows. 

A healthy and green recovery from COVID-19 includes the importance of ensuring a quick transition to clean and sustainable energy”, said Dr. Neira. 

Feeding into autumn summit 
This seventh edition of the report formerly known as the Global Tracking Framework comes at a crucial time as Governments and others are gearing up for the UN High-level Dialogue on Energy in September 2021 aimed to examine what is needed to achieve SDG7 by 2030, including discussions on fossil fuel phase-out strategies, and mobilize voluntary commitments and actions through Energy Compacts.  

The report will inform the summit-level meeting on the current progress towards SDG 7, “four decades after the last high-level event dedicated to energy under the auspices of UN General Assembly”, said Mr. Schweinfest. 

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Minnesota Carbon-Free Power by 2050 aims to shift utilities to renewable energy, wind and solar, boosting efficiency while managing grid reliability, emissions, and costs under a clean energy mandate and statewide climate policy.

Key Points

A statewide goal to deliver 100% carbon-free power by 2050, prioritizing renewables, efficiency, and grid reliability.

✅ Targets 100% carbon-free electricity statewide by 2050

✅ Prioritizes wind, solar, and efficiency before fossil fuels

✅ Faces utility cost, reliability, and legislative challenges

Gov. Tim Walz's plan for Minnesota to get 100 percent of its electricity from carbon-free sources by 2050, similar to California's 100% carbon-free mandate in scope, was criticized Tuesday at its first legislative hearing, with representatives from some of the state's smaller utilities saying they can't meet that goal.

Commerce Commissioner Steve Kelley told the House climate committee that the Democratic governor's plan is ambitious. But he said the state's generating system is "aging and at a critical juncture," with plants that produce 70 percent of the state's electricity coming up for potential retirement over the next two decades. He said it will ensure that utilities replace them with wind, solar and other innovative sources, and increased energy efficiency, before turning to fossil fuels.

"Utilities will simply need to demonstrate why clean energy would not work whenever they propose to replace or add new generating capacity," he said.

Walz's plan, announced last week, seeks to build on the success of a 2007 law that required Minnesota utilities to get at least 25 percent of their electricity from renewable sources by 2025. The state largely achieved that goal in 2017 thanks to the growth of wind and solar power, and the topic of climate change has only grown hotter, with some proposals like a fully renewable grid by 2030 pushing even faster timelines, hence the new goal for 2050.

But Joel Johnson, a lobbyist for the Minnkota Power Cooperative, testified that the governor's plan is "misguided and unrealistic" even with new technology to capture carbon dioxide emissions from power plants. Johnson added that even the big utilities that have set goals of going carbon-free by mid-century, such as Minneapolis-based Xcel Energy, acknowledge they don't know yet how they'll hit the net-zero electricity by mid-century target they have set.

Minnkota serves northwestern Minnesota and eastern North Dakota.

Tim Sullivan, president and CEO of the Wright-Hennepin Cooperative Electric Association in the Twin Cities area, said the plan is a "bad idea" for the 1.7 million state electric consumers served by cooperatives. He said Minnesota is a "minuscule contributor" to total global carbon emissions, even as the EU plans to double electricity use by 2050 to meet electrification demands.

"The bill would have a devastating impact on electric consumers," Sullivan said. "It represents, in our view, nothing short of a first-order threat to the safety and reliability of Minnesota's grid."

Isaac Orr is a policy fellow at the Minnesota-based conservative think tank, the Center for the American Experiment, which released a report critical of the plan Tuesday. Orr said all Minnesota households would face higher energy costs and it would harm energy-intensive industries such as mining, manufacturing and health care, while doing little to reduce global warming.

"This does not pass a proper cost-benefit analysis," he testified.

Environmental groups, including Conservation Minnesota and the Sierra Club, supported the proposal while acknowledging the challenges, noting that cleaning up electricity is critical to climate pledges in many jurisdictions.

"Our governor has called climate change an existential crisis," said Kevin Lee, director of the climate and energy program at the Minnesota Center for Environmental Advocacy. "This problem is the defining challenge of our time, and it can feel overwhelming."

Rep. Jean Wagenius, the committee chairwoman and Minneapolis Democrat who's held several hearings on the threats that climate change poses, said she expected to table the bill for further consideration after taking more testimony in the evening and would not hold a vote Tuesday.

While the bill has support in the Democratic-controlled House, it's not scheduled for action in the Republican-led Senate. Rep. Pat Garofalo, a Farmington Republican, quipped that it "has a worse chance of becoming law than me being named the starting quarterback for the Minnesota Vikings."

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Duke Energy Carolinas Solar RFP draws 3.9 GW of utility-scale bids, oversubscribed in DEP and DEC, below avoided cost rates, minimal battery storage, strict PPA terms, and interconnection challenges across North and South Carolina.

Key Points

Utility-scale solar procurement in DEC and DEP, evaluated against avoided cost, with few storage bids and PPA terms.

✅ 3.9 GW bids for 680 MW; DEP most oversubscribed

✅ Most projects 7-80 MWac; few include battery storage

✅ Bids must price below 20-year avoided cost estimate

Last week the independent administrator for Duke’s 680 MW solar solicitation revealed data about the projects which have bid in response to the offer, showing a massive amount of interest in the opportunity.

Overall, 18 individuals submitted bids for projects in Duke Energy Carolinas (DEC) territory and 10 in Duke Energy Progress (DEP), with a total of more than 3.9 GW of proposals – more nearly 6x the available volume. DEP was relatively more over-subscribed, with 1.2 GWac of projects vying for only 80 MW of available capacity.

This is despite a requirement that such projects come in below the estimate of Duke’s avoided cost for the next 20 years, and amid changes in solar compensation that could affect project economics. Individual projects varied in capacity from 7-80 MWac, with most coming within the upper portion of that range.

These bids will be evaluated in the spring of 2019, and as Duke Energy Renewables continues to expand its portfolio, Duke Energy Communications Manager Randy Wheeless says he expects the plants to come online in a year or two.

Lack of storage

Despite recent trends in affordable batteries, of the 78 bids that came in only four included integrated battery storage. Tyler Norris, Cypress Creek Renewables’ market lead for North Carolina, says that this reflects that the methodology used is not properly valuing storage.

“The lack of storage in these bids is a missed opportunity for the state, and it reflects a poorly designed avoided cost rate structure that improperly values storage resources, commercially unreasonable PPA provisions, and unfavorable interconnection treatment toward independent storage,” Norris told pv magazine.

“We’re hopeful that these issues will be addressed in the second RFP tranche and in the current regulatory proceedings on avoided cost and state interconnection standards and grid upgrades across the region.”

Limited volume for North Carolina?

Another curious feature of the bids is that nearly the same volume of solar has been proposed for South Carolina as North Carolina – despite this solicitation being in response to a North Carolina law and ongoing legal disputes such as a church solar case that challenged the state’s monopoly model.

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NnG Offshore Wind Farm restarts construction off Scotland, backed by EDF Renewables and ESB, CfD 2015, 54 turbines, powering 375,000 homes, 500 jobs, delivering GBP 540 million, with Covid-19 safety measures and staggered workforce.

Key Points

A 54-turbine Scottish offshore project by EDF Renewables and ESB, resuming to power 375,000 homes and support 500 jobs.

✅ Awarded a CfD in 2015; 54 turbines off Scotland's east coast.

✅ Projected to power 375,000 homes and deliver GBP 540 million locally.

✅ Staggered workforce return with Covid-19 control measures and oversight.

Neart Na Gaoithe (NnG) Offshore Wind Farm, owned by  EDF Renewables and Irish firm ESB, stopped construction in March, even as the world's most powerful tidal turbine showcases progress in marine energy.

Project boss Matthias Haag announced last night the 54-turbine wind farm would restart construction this week, as the largest UK offshore wind farm begins supplying power, underscoring sector momentum.

Located off Scotland’s east coast, where wind farms already power millions of homes, it was awarded a Contract for Difference (CfD) in 2015 and will look to generate enough energy to power 375,000 homes.

It is expected to create around 500 jobs, and supply chain growth like GE's new offshore blade factory jobs shows wider industry momentum, while also delivering £540 million to the local economy.

Mr Haag, NnG project director, said the wind farm build would resume with a small, staggered workforce return in line social distancing rules, and with broader energy sector conditions, including Hinkley Point C setbacks that challenge the UK's blueprint.

He added: “Initially, we will only have a few people on site to put in place control measures so the rest of the team can start work safely later that week.

“Once that’s happened we will have a reduced workforce on site, including essential supervisory staff.

“The arrangements we have put in place will be under regular review as we continue to closely monitor Covid-19 and follow the Scottish Government’s guidance.”

NnG wind farm, a 54-turbine projects, was due to begin full offshore construction in June 2020 before the Covid-19 outbreak, at a time when a Scottish tidal project had just demonstrated it could power thousands of homes.

EDF Renewables sold half of the NnG project to Irish firm ESB in November last year, and parent company EDF recently saw the Hinkley C reactor roof lifted into place, highlighting progress alongside renewables.

The first initial payment was understood to be around £50 million.

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