The London airport, which is one of the world’s busiest for international travel, said it expects “significant disruption over the coming days” and warned passengers not to come until it reopens.

London's Heathrow Airport will be closed Friday after experiencing a "significant power outage" due to a fire at an electrical substation supplying the airport.

Britain's Heathrow Airport closed on Friday after a fire at a nearby electrical substation caused a power outage, airport officials said.