London's Heathrow Airport closed for the day after a substation fire,
disrupting travel
[March 21, 2025]
By BRIAN MELLEY and DANICA KIRKA
LONDON (AP) — Britain’s Heathrow Airport was closed all day Friday after
a fire at a nearby electrical substation knocked out its power,
disrupting flights for hundreds of thousands of passengers at Europe's
busiest travel hub.
At least 1,350 flights to and from Heathrow were affected, flight
tracking service FlightRadar 24 said, and the impact was likely to last
several days as passengers try to reschedule their travel.
Some 120 flights were in the air when the closure was announced, with
some turned around and others diverted to Gatwick Airport outside
London, Charles de Gaulle Airport in Paris or Ireland’s Shannon Airport,
tracking services showed.
Lawrence Hayes was three-quarters of the way to London from John F.
Kennedy International in New York when Virgin Atlantic announced they
were being diverted to Glasgow.
“It was a red-eye flight and I’d already had a full day, so I don’t even
know how long I’ve been up for,” Hayes told the BBC as he was getting
off the plane in Scotland. "Luckily I managed to get hold of my wife and
she’s kindly booked me a train ticket to get back to Euston, but it’s
going to be an incredibly long day.”
Fire under control but impact to last days
The fire at a power station about 2 miles from the airport was brought
under control about seven hours after it erupted in a ball of flames,
the London Fire Brigade said.
“We don’t know the cause of this fire. It’s obviously an unprecedented
event,” Energy Secretary Ed Miliband said.
Miliband said the fire had also knocked out a backup power supply to the
airport. Heathrow said in a statement that the fire had given it no
choice but to close the airport for the day.
“We expect significant disruption over the coming days, and passengers
should not travel to the airport under any circumstances until the
airport reopens," the airport said.

Heathrow is one of the world’s busiest airports for international
travel. It had its busiest January on record earlier this year, with
more than 6.3 million passengers, up more than 5% from the same period
last year. January also was the 11th month in a row that it averaged
over 200,000 passengers a day, with the airport citing trans-Atlantic
travel as a key contributor.
The disruption was reminiscent of the 2010 eruption of Iceland’s
Eyjafjallajokull volcano, which spewed clouds of ash into the atmosphere
and created trans-Atlantic air travel chaos for months.
Heathrow was at the heart of a shorter disruption in 2023 when Britain’s
air traffic control system was hit by a breakdown that slowed takeoffs
and landings across the U.K. on one of the busiest travel days of the
year.
Anita Mendiratta, an aviation consultant, said the impact of the closure
will be felt over two to four days as airlines, cargo carriers, and
crews are re-mobilized and passengers rebooked.
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Passengers with suitcases wait on a nearby road after Britain's
Heathrow Airport has closed for the full day Friday after an
electrical substation fire knocked out its power, disrupting flights
for hundreds of thousands of passengers at one of Europe's biggest
travel hubs in London, Friday, March 21, 2025.(AP Photo/Kin Cheung)

“As soon as the airport opens up at midnight tonight, it’s not only
about resuming with tomorrow’s flights, it’s the backlog and the
implications that have taken place,” Mendiratta said. “Crew and
aircraft, many are not where they’re supposed to be right now. So
the recalculation of this is going to be intense.”
Diverted, canceled and in limbo
United Airlines said seven of its flights returned to their origin
or diverted to other airports and its flights Friday to Heathrow
were canceled.
At least two flights from Taiwan to London were affected, the
island’s Central News Agency reported. A China Airlines flight that
left in the morning turned around and was headed back to Taiwan. An
EVA Air flight stopped in Bangkok, a planned stopover, while the
airline assessed the situation in London.
Singapore Airlines said on the X social media platform that its
overnight flight to London was diverted to Frankfurt.
The FlightAware website showed more cancellations, including two
from JFK in New York, a Delta Airlines flight and an American
Airlines flight.
National Rail canceled all trains to and from the airport.
Blaze lit up the sky and darkened homes
The London Fire Brigade sent 10 fire engines and around 70
firefighters to control the blaze after flames soared into the sky
when a transformer at an electrical substation caught fire in west
London late Thursday night.
About 150 people were evacuated from their homes near the power
station.
“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. “Thanks to their efforts and
coordinated multi-agency response, we successfully contained the
fire and prevented further spread.”
Scottish and Southern Electricity Networks said in a post on X the
power outage affected more than 16,300 homes.
Heathrow normally opens for flights at 6 a.m. due to nighttime
flying restrictions. It said the closure would last until 11:59 p.m.
Friday.
The U.K. government earlier this year approved building a third
runway at the airport to boost the economy and connectivity to the
world.
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