March 21, 2025, 4:39 a.m. ET - Chaos erupted across international travel networks as Heathrow Airport, one of the busiest airports in the world, was forced to shut down on Friday due to a devastating fire at a nearby electrical substation. The incident has left countless passengers stranded and uncertain about their travel plans.

Warren Hu, a college student flying from New York to London, was one of many caught off guard by the closure. Moments before his flight was supposed to depart for London, he received the news that the plane would be returning to the United States instead. “I’m a bit surprised, but we can find a solution, so I’m trying to stay calm,” he texted, embodying the mix of disbelief and resilience shared by many travelers.

The closure of Heathrow has created a shockwave throughout the aviation industry, impacting flights both arriving and departing from various locations around the world. A glance at the flight information board on Friday revealed a slew of cancellations and delays, with flights from countries like Vietnam, India, and Brunei unable to land. Passengers had been gearing up for trips to cities as diverse as Tokyo, Miami, and Minneapolis, only to be met with sudden changes.

In China, Lukas Zou was among those waiting anxiously for information about his Shenzhen Airlines flight, which was supposed to take off shortly before the cancellation. Faced with a mix of luggage issues and hotel bookings that could not be canceled, he expressed his frustration: “With so much luggage, I don’t know if I should laugh or cry.” Fortunately, he indicated that the airline was providing hotel accommodations for affected travelers.

As authorities assess the situation, they have warned that the flight disruptions caused by the Heathrow closure could extend far beyond Friday, threatening to create additional complications for global travel in the days to come.