Drivers warned to not drive as Heathrow chaos leaves thousands of holidaymakers facing a nightmare start to their getaway

Something has gone wrong at one of the world’s busiest airports, and anyone due to fly this weekend needs to know about it before they set off.

What has happened at Heathrow

No one wants a stressful start to their trip, it should all be about excitement and mooching around the duty free, but passengers heading to Terminals 2 and 3 on Saturday, August 15 in the morning have been told, in no uncertain terms, to travel to the airport by road, after a leak in a water pipe within the airport’s own grounds have flooded the Central Terminal Area. Heathrow confirmed the cause was the pipe leak, with water submerging the stretch of road network linking both terminals to the surrounding motorways.

Access into the area has been completely shut off, cutting road access to two of the airport’s four operational terminals. Engineering crews have been working since the early hours to pump away standing water and check for any structural damage, while investigators continue to establish exactly why the pipe failed.

Why this matters if you are flying today

Flights themselves are still departing and arriving as normal, which is the one piece of good news in an otherwise stressful situation. Even so, Heathrow wants to heavily reinforce the real risk, getting stuck in gridlock outside the terminal could cost passengers their flight.

Anyone travelling to or from Terminal 2 or Terminal 3 has been urged to ditch the car entirely and use the Heathrow Express, Elizabeth Line or Piccadilly Line instead. Drivers with no alternative to a vehicle are being told to head for a Park and Ride site, or divert to Terminal 4 or Terminal 5 and pick up the free inter-terminal rail link from there.

Timing could not be worse

Saturday’s disruption lands slap bang in the middle of the school summer holidays, historically one of Heathrow’s busiest stretches of the year. Just last month, on July 19, the airport recorded its busiest day of 2026 so far, with 267,000 passengers passing through in 24 hours. A separate incident back in May saw a burst water main near Heathrow’s Eastern Perimeter Road swamp a nearby car park, submerging roughly 143 vehicles in around 15 minutes, pipework problems at the airport seem to be coming regular occurrence.

Anyone travelling to Heathrow today is advised to build in significantly more time than usual for the journey if you were planning on driving to the airport.