Britain's Heathrow Airport, a major travel hub, said it would be closed all of Friday after a huge fire at a nearby electrical substation wiped out power, disrupting flight schedules around the world.

London's Heathrow Airport, which shuttered on Friday after a fire broke out at a substation serving the aviation hub, is Europe's busiest in terms of passengers. Heathrow also experienced its busiest December on record last year,

London's Heathrow Airport, one of the busiest in the world, closed on Friday due to a "significant power outage," it said.