Heathrow Terminal 4 evacuated over hazardous materials later reopened

Heathrow Airport temporarily closed and evacuated Terminal 4 on Monday evening after emergency services responded to a possible hazardous materials incident, officials said, before reopening the terminal later that night once it was declared safe. The London Fire Brigade said crews were first called at 17:01 and specialist teams from Feltham, Heathrow, Wembley and surrounding stations were deployed to assess the scene. Heathrow Airport advised passengers not to travel to Terminal 4 and asked staff to support those on site.

"Firefighters are responding to a possible hazardous materials incident at Heathrow Airport," a London Fire Brigade spokesperson said. "Specialist crews have been deployed to carry out an assessment of the scene, and part of the airport has been evacuated as a precaution whilst firefighters respond." A Heathrow spokesman said in a post on social media platform X, "Terminal 4 check in has been closed and evacuated while emergency services respond to an incident. Please do not travel to Terminal 4. Colleagues are supporting passengers on site. We will provide further information as soon as we can. All other terminals are operating as normal."