London’s Heathrow Airport announced a complete shutdown all day Friday due to a “significant power outage” due to a large fire nearby, causing massive disruption to one of the world’s busiest travel hubs as flights were forced to turn back midair or divert to other locations.
“Due to a fire at an electrical substation supplying the airport, Heathrow is experiencing a significant power outage,” Heathrow Airport said in a statement on X. “To maintain the safety of our passengers and colleagues, Heathrow will be closed until 23h59 on 21 March.”
“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 in a statement , adding that they “do not have clarity on when power may be reliable restored.”
A transformer at an electrical substation in Hayes, a London suburb located just a few miles from the airport, caught fire Thursday night, according to the London Fire Brigade. The cause is not yet known, and firefighters were still working to extinguish the blaze as of early Friday morning.
The brigade said it evacuated 150 people from the area. More than 16,000 homes lost power, according to utility supplier Scottish and Southern Electricity Networks — with Britain’s National Grid “working at speed” to restore power.
The shutdown could affect tens of thousands of travelers. Heathrow was the world’s fourth-busiest airport in 2023, according to the most recent data, with a record-breaking 83.9 million passengers passing through last year.
“The fire has caused a power outage affecting a large number of homes and local businesses, and we are working closely with our partners to minimise disruption,” said London Fire Brigade assistant commissioner Pat Goulbourne.
In January, the government gave permission for Heathrow to build a third runway — which could be ready by 2035 — after years of legal wrangling brought on by complaints from local residents.
Five major airports serve the capital and towns nearby.
But capacity is stretched, especially at Heathrow whose two runways each measure almost four kilometres in length, while the airport covers a total area 12.3 square kilometres.
It opened in 1946 as London Airport before being renamed Heath Row, a hamlet demolished two years earlier to make way for the construction.
Situated 25 kilometres (15 miles) west of central London, the present Heathrow serves 200 destinations in more than 80 countries, with passengers having access to four terminals.
Among its main flight destinations last year were Dublin, Los Angeles, Madrid and New York.
