Passengers at London’s Heathrow Airport encountered significant disruptions due to fires at an electrical substation, leading to flight diversions. The incident caused delays, affecting travelers like comedian Adam Conover. Meanwhile, British Airways passengers at JFK Airport in New York faced lengthy queues and uncertainty while attempting to reschedule their flights. The disruptions were a result of the fires at the substation, prompting reassurances from Heathrow’s CEO that operations would return to normal by Saturday.