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The ability lower has thrown airline schedules around the globe into disarray as a whole lot of flights are cancelled or compelled to divert.
Round 70 firefighters had been tackling the blaze on Friday morning and about 150 folks had been evacuated from close by buildings.
The hearth was introduced below management by 8am and an investigation is now trying into its trigger.
Here’s what we all know concerning the challenge.

Aeroplanes are grounded on Friday
Reuters
Why is Heathrow Airport closed?
The airport, which is equipped by the substation, mentioned it was additionally affected by the ability outage.
Power secretary Ed Miliband mentioned the fireplace “seems to have knocked out a back-up generator in addition to the substation itself”.
Pat Goulbourne of London Hearth Brigade mentioned at round 8am that the fireplace was “below management” and an investigation was going down.
Scottish and Southern Electrical energy Networks tweeted that there was a large-scale energy outage in Hayes, Hounslow and the encircling areas affecting greater than 16,300 properties.
Based on the ability firm’s web site, authorities aimed to revive energy by 3pm on Friday.
What number of flights have been disrupted?
Passengers are being warned to anticipate disruption for a number of days, and plenty of planes and flight crews are within the flawed location.
On-line flight monitoring service Flightradar24 mentioned the closure would have an effect on greater than 1,350 flights to and from Heathrow on Friday. This contains 679 scheduled to land and 678 because of take off from the airport.
It mentioned 120 flights to the airport had been within the air when the closure was introduced.

The hearth in Hayes
Courtesy of X person @chrisjbrogan
When may flights be restored to and from Heathrow?
On the time of writing Heathrow will not be positive when the ability could also be reliably restored.
A Heathrow spokesperson mentioned: “Heathrow is experiencing a big energy outage throughout the airport because of a big hearth at a close-by electrical substation. While hearth crews are responding to the incident, we do not need readability on when energy could also be reliably restored.
“To take care of the protection of our passengers and colleagues, we now have no selection however to shut Heathrow till 23h59 on 21 March 2025. We anticipate important disruption over the approaching days and passengers shouldn’t journey to the airport below any circumstances till the airport reopens.
“We are going to present an replace when extra data on the resumption of operations is out there. We all know this will probably be disappointing for passengers and we wish to reassure that we’re working as onerous as attainable to resolve the scenario.”

Law enforcement officials close to the scene of the substation
AFP through Getty Pictures
The place are flights being diverted to? Can passengers board elsewhere?
On-line monitoring providers confirmed flights being diverted to Gatwick, Charles de Gaulle Airport in Paris and Eire’s Shannon Airport.
Quite a lot of flights had been additionally rotated and returned to airports in Canada and the USA.
Gatwick Airport accepted seven diverted flights from places together with Singapore, Johannesburg, Lagos, Cape City and Doha that had been initially destined for Heathrow.
Shannon Airport in Co Clare accepted six diversions from Toronto, Atlanta, Bridgetown Barbados, Boston, Orlando and Newark.
Aviation advisor John Strickland mentioned the closure of Heathrow for a whole day is “a large dislocation to should get better from”.
He added: “As soon as an plane is within the flawed place with the crew, for those who’re away from dwelling you do not have one other crew to immediately carry the airplane and the passengers again. You have to wait till that crew has taken its relaxation, which is all the time required after an obligation interval.
“We’re speaking about a number of days’ price of disruption to get the planes recovered and begin utilizing them once more to maneuver deliberate and disrupted passengers.”
He likened the disruption to what occurred after the September 11 terrorist assaults in 2001, when flights had been grounded throughout the US.
He mentioned: “It is a contained model of 9/11”.
Can passengers get compensation?
Rory Boland, editor of journal Which? Journey, mentioned affected passengers aren’t entitled to compensation however airways ought to present help equivalent to in a single day lodging if required and re-routing bookings, together with with rival carriers from various airports.
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