Heathrow airport has shut down after a fire at a nearby electrical substation caused a mass power outage overnight.
The airport will be closed all day and will not reopen until midnight tonight.
A statement posted on the airport’s X account read: “Due to a fire at an electrical substation supplying the airport, Heathrow is experiencing a significant power outage.
“To maintain the safety of our passengers and colleagues, Heathrow will be closed until 23h59 on 21 March. Passengers are advised not to travel to the airport and should contact their airline for further information. We apologise for the inconvenience.”
At least 1,351 flights going to and from Heathrow will be impacted by the closure, in a major disruption bound to trigger chaos at airports around the world.
A Heathrow spokesperson said passengers should also brace for disruption over the coming days.
More than 16,300 homes are also suffering from blackouts because of the fire raging at the electrical substation in Hayes.
Around 70 firefighters and 10 fire engines are battling the blaze on Nestles Avenue, London Fire Brigade said.
The cause of the fire is yet to be determined.
Latest updates
Chanel Zagon
21 March 2025 6:02am
6:02AM
Flights to London from around the world cancelled
An airline departure board at Singapore’s Changi airport showed that a TAP Air Portugal flight to Heathrow was cancelled.
Changi Airport in Singapore cancels flight to London Heathrow
5:49AM
‘Chaotic few days’ ahead
Travel experts have said the disruption will extend far beyond Heathrow.
This is because airlines’ carefully choreographed networks depend on planes and crews being in specific locations at specific times.
Dozens of air carriers will have to rush to reconfigure their networks to move planes and crews around.
“The other question is, ‘What will airlines do to deal with the backlog of passengers?’”, said travel industry analyst Henry Harteveldt with Atmosphere Research Group.
“It’s going to be a chaotic couple of days.”
THE TELEGRAPH