Quotes displayed in real-time or delayed by at least 15 minutes. Market data provided by <a href="https://www.factset.com/">Factset</a>. Powered and implemented by <a href="https://www.factset.com/solutions/business-needs/digital-solutions">FactSet Digital Solutions</a>. <a href="https://www.factset.com/privacy">Legal Statement</a>. <br>This material may not be published, broadcast, rewritten, or redistributed. ©2025 FOX News Network, LLC. All rights reserved. <a href="https://help.foxbusiness.com/hc/en-us/sections/4405278462107-FAQ">FAQ</a> - <a href="/privacy-policy">New Privacy Policy</a><br>Passengers globally faced delays after a fire at North Hyde Electricity Substation knocked out power on Friday. Video shows flames and plumes of smoke. (@fire_at_Vill/TMX)<br><a href="https://www.foxbusiness.com/category/fox-news-airports" target="_blank" rel="noopener">London Heathrow Airport</a> announced a reopening on Friday after a fire caused a "significant" power outage in an incident being investigated by the Metropolitan Police's Counter Terrorism Command. <br>"While there is currently no indication of foul play, we retain an open mind at this time," authorities said. The airport earlier told Fox News that it was "experiencing a significant power outage across the airport due to a large fire at a nearby electrical substation" and that it would be closed for the entire day.<br>"Our teams have worked tirelessly since the incident to ensure a speedy recovery. We’re pleased to say we’re now safely able to begin some flights later today. Our first flights will be repatriation flights and relocating aircraft," a spokesperson for the airport later said.<br>"Please do not travel to the airport unless your airline has advised you to do so. We will now work with the airlines on repatriating the passengers who were diverted to other airports in Europe," the spokesperson added. "We hope to run a full operation tomorrow and will provide further information shortly."<br>The Metropolitan Police said "given the location of the substation and the impact this incident has had on critical national infrastructure, the Met's Counter Terrorism Command is now leading inquiries."<br><a href="https://www.foxbusiness.com/economy/british-airways-crewmember-accidentally-deploys-emergency-slide-airport" target="_blank" rel="noopener"><strong>BRITISH AIRWAYS CREWMEMBER ACCIDENTALLY DEPLOYS EMERGENCY SLIDE AT LONDON HEATHROW</strong></a><br><span>A fire at the North Hyde Electricity Substation in Hayes prompted a massive power outage at London's Heathrow Airport.</span><span> (London Fire Brigade/Reuters / Reuters)</span><br>It also said, "We are working with [the] London Fire Brigade to establish the cause of the fire, which remains under investigation."<br>The airport was anticipating up to 291,000 passengers on a <a href="https://www.foxbusiness.com/category/fox-news-airlines" target="_blank" rel="noopener">total of 1,351 flights</a> on Friday, Reuters reported. Passengers have been told to contact their individual airline for further details on <a href="https://www.foxnews.com/travel" target="_blank" rel="noopener">new flight times.</a><br>Airlines began issuing statements on Friday addressing how the closure would impact their passengers and flights to and from the airport.<br><span>Police stand near traffic outside Terminal 5 at London's Heathrow Airport during the closure on Friday.</span><span> (Reuters/Carlos Jasso / Reuters)</span><br><a href="https://www.foxbusiness.com/lifestyle/massive-power-outage-bwi-airport-impacts-thousands-passengers-extensive-delays" target="_blank" rel="noopener"><strong>MASSIVE POWER OUTAGE AT MARYLAND AIRPORT IMPACTS THOUSANDS OF PASSENGERS WITH EXTENSIVE DELAYS</strong></a><br>British Airways said the disruption "will clearly have a significant impact on our operation and our customers and we're working as quickly as possible to update them on their travel options for the next 24 hours and beyond."<br>A United Airlines spokesperson told FOX Business, "Following the closure, seven United flights returned to their origin or to other airports, and Friday flights to London Heathrow have been canceled."  <br>"We are continuing to work with our customers to offer alternative travel options," the spokesperson added.<br><span>Passenger aircraft operated by British Airways on the tarmac at London's Heathrow Airport on Friday.</span><span> (Leon Neal/Getty Images / Getty Images)</span><br>A Lufthansa Group Airlines spokesperson said that "all Lufthansa Group Airlines flights to and from London Heathrow on Friday, 21 March 2025 have to be canceled."<br>"Passengers affected by the flight cancellations have been rebooked on other flights and informed about it," the company told FOX Business.<br>The <a href="https://www.foxbusiness.com/category/fox-news-world" target="_blank" rel="noopener">London Fire Brigade</a> said approximately 70 firefighters and 10 engines responded to the fire just before midnight on Thursday at the electrical substation on Nestles Avenue in Hayes.<br><span>A man speaks on his phone near a notice about the power outage at Heathrow International Airport at the Paddington railway station in London.</span><span> (Reuters/Isabel Infantes / Reuters)</span><br>"This was a very visible and significant incident, and our firefighters worked tirelessly in challenging conditions to bring the fire under control as swiftly as possible," Assistant Commissioner Pat Goulbourne said in a statement, adding that the fire was under control by 6:30 a.m.<br>Though there were no injuries, the brigade said 29 people were evacuated from neighboring properties and 150 others were evacuated from a 200-meter perimeter that was established out of precaution. <br>The fire brigade will remain at the scene throughout the day to assist the National Grid, which owns the high-voltage electricity transmission network in England and Wales.<br><span>An electrical substation that supplies London Heathrow Airport caught on fire on Friday, causing a significant power outage that shut down the entire airport.</span><span> (Benjamin Cremel/AFP via Getty Images / Getty Images)</span><br>Former British military intelligence officer Philip Ingram <a href="https://www.reuters.com/world/uk/uks-heathrow-airport-experiences-power-outage-due-fire-substation-2025-03-21/" target="_blank" rel="nofollow noopener">told Reuters</a> that the incident was a "wake-up call."<br><a href="https://www.foxbusiness.com/apps-products" target="_blank" rel="noopener"><strong><u>GET FOX BUSINESS ON THE GO BY CLICKING HERE</u></strong></a> <br>"There is no way that Heathrow should be taken out completely because of a failure in one power substation," he said. <br><i>Fox News' Simon Owen and FOX Business' Chrys Mulligan contributed to this report.</i><br><br>Get a brief on the top business stories of the week, plus CEO interviews, market updates, tech and money news that matters to you.<br>We've added you to our mailing list.<br>By clicking subscribe, you agree to the Fox News <a href="https://www.foxnews.com/privacy-policy" target="_blank">Privacy Policy</a> and <a href="https://www.foxnews.com/terms-of-use" target="_blank">Terms of Use</a>, and agree to receive content and promotional communications from Fox News. 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