London’s Heathrow Airport — one of the world’s busiest — announced that it would remain closed for all of March 21 due to a “significant power outage” caused by a fire at a nearby substation. Heathrow’s closure has already impacted more than 1,300 flights, according to FlightRadar24. According to the service, the top route to and from Heathrow is the connection with New York’s JFK International Airport, with 146 flights every week. Get the latest updates at the link in our bio. #london #heathrow #travel