A grass fire forced the closure of Heathrow’s main runway today, disrupting flights and causing chaos at the UK’s busiest airport. The blaze, which started on the southern runway, prompted emergency services to respond swiftly. Firefighters worked to contain the fire, which threatened to block one of the airport’s primary takeoff and landing paths. The incident led to significant delays and cancellations, affecting hundreds of passengers. Airport authorities confirmed the runway was fully operational again after the fire was extinguished. Officials are investigating the cause of the blaze, which occurred during a dry spell in the region. The event highlights the vulnerability of critical infrastructure to natural disasters.