London Fire Brigade crews investigate hazardous materials alert at Heathrow Terminal 4. Flights largely unaffected, but passengers diverted.
Heathrow Airport ’s Terminal 4 was evacuated on Monday evening after firefighters responded to a “possible hazardous materials incident,” according to the London Fire Brigade .The brigade said specialist crews were deployed to assess the scene after being called at 5:01 pm.
Firefighters from Feltham, Heathrow, Wembley, and nearby stations attended.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 pic.twitter.com/Zdbc8D7gw3— Heathrow Airport September 8, 2025The airport announced on X that check-in at Terminal 4 was closed and passengers were asked not to travel there. It added that colleagues are supporting travellers on site, while all other terminals remain open.National Rail Enquiries also said trains were unable to call at Heathrow Terminal 4 due to the incident.Despite the evacuation, Heathrow’s website showed flights from Terminal 4 still scheduled to depart on time, with only a Saudia flight to Jeddah currently listed as delayed.Heathrow is the UK’s busiest airport.This is a developing story and will be updated as more information becomes available.
Hazmat Incident Heathrow Airport London Fire Brigade Terminal 4 Evacuation UK Airports
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London's Heathrow Airport evacuated over possible hazardous materialThe London Fire Brigade says a terminal at Heathrow Airport was evacuated Monday because of possible hazardous material. Crowds of passengers were seen outside Terminal 4 as firefighters responded to the scene. The terminal was evacuated as a precaution, the fire department said.
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