London, United Kingdom - September 08, 2025 Video recorded by X user Murcia White shows the evacuation of Heathrow Airport’s Terminal 4 on September 8, 2025. Passengers are seen outside with their luggage as emergency vehicles respond to a potential hazardous materials incident. The check-in area was temporarily closed while authorities assessed the situation. After inspection, no hazardous material was found, and the terminal was declared safe to reopen. The evacuation highlights ongoing challenges in airport security and emergency response, requiring coordination between multiple agencies. This incident is part of a wider context of serious airport emergencies, recalling events such as the 2016 Brussels Airport terrorist attack, which prompted increased global security measures.