Live from Heathrow, London: A major fire at an electrical substation in Hayes, England, has caused a massive power outage, forcing the closure of Britain's busiest airport.
Firefighters are battling the blaze, with evacuations underway.
Travelers are advised to check with airlines for updates.
Passengers at Heathrow Airport said they felt 'reassured', after the airport said it was "fully operational" Saturday, a day after..
Around 1,351 flights have been cancelled after a fire broke out at a nearby electrical substation that supplies power to Heathrow..
