Heathrow Airport, one of the busiest airports in Europe, faced severe disruption on March 21 after a fire broke out at an electrical substation in North Hyde. The incident resulted in the cancellation or diversion of more than 1,000 flights, affecting thousands of passengers and halting operations at the crucial air travel hub. Thomas Woldbye, Heathrow’s chief executive, described the situation as “unprecedented,” highlighting the airport's loss of power equivalent to that of a midsize city.
Heathrow Airport Returns to Normal After Major Shutdown Due to Fire

Heathrow Airport Returns to Normal After Major Shutdown Due to Fire
A significant fire at an electrical substation led to thousands of flight cancellations and diversions at Heathrow Airport on March 21, 2025, before the airport resumed operations.
Despite the chaos, Woldbye expressed confidence that normal operations would resume by the following day, Saturday. The blaze, which was addressed effectively by emergency services, prompted the involvement of the counterterrorism police due to its potential implications; however, authorities later indicated there was no immediate suspicion of foul play.
As the investigation into the fire's cause continues, questions are being raised regarding the airport's dependency on a single electrical substation and its resilience to such outages. The full economic impact of the disruption remains to be assessed as operations return to normal in the following days.
As the investigation into the fire's cause continues, questions are being raised regarding the airport's dependency on a single electrical substation and its resilience to such outages. The full economic impact of the disruption remains to be assessed as operations return to normal in the following days.