As Britain sweltered through one of many heatwaves in late June, towering thunderclouds gathered over the south of England and across much of northern Europe. It was a Saturday, the holiday season was beginning, and thousands of passengers were heading to Heathrow and Gatwick.
What happened that day
As air traffic controllers struggled to route aircraft around the storms, airspace became heavily congested and many planes were simply held on the ground. In the end, around 900 flights to and from the two airports were delayed, some by up to 11 hours. Dozens more were cancelled, and passengers across Europe waiting to fly into London faced long delays of their own.
The weather has cooled and passengers will forget. But some within the industry believe June should be read as a warning.
Why it is expected to repeat
The timing in this case was unlucky. The concern is that such incidents become more common as the effects of climate change accumulate and weather systems grow less stable — making disruption more likely and adding costs for airlines, airports and travellers.
Tim Atkinson, an airline risk consultant and former pilot, says the very crowded skies over the UK and northern Europe leave the region particularly exposed. He sees a real risk that all of London's airports could be hit by storms at the same time, with major consequences in the air and on the ground.
What it means in Bangladesh
Bangladesh does not have Europe's congestion problem. It has a sharper version of the weather one.
Dhaka's Hazrat Shahjalal International handles the overwhelming majority of the country's international traffic, and the alternatives are thin: Chattogram and Sylhet can absorb some diversions, but not a Dhaka closure at scale. Pre-monsoon nor'westers — violent thunderstorms with sudden wind shear — are exactly the phenomenon that grounded flights in England, and they arrive here every year between March and May. Cyclone season adds a second window.
Three consequences deserve more attention than they get. The first is that a country with one dominant airport carries concentrated risk, which is part of the argument for the third terminal being matched by genuine capacity elsewhere rather than by more capacity in the same place.
The second is commercial. Bangladesh's export model depends on air freight for the high-value, time-critical share of garment shipments — the orders that exist precisely because they can be delivered fast. Weather disruption that delays a container ship costs days; disruption that grounds air freight can cost a contract.
The third is the one passengers can act on. Bangladeshi travellers overwhelmingly buy the cheapest ticket with the tightest connection, often through a single hub. In an era of more frequent weather disruption, a two-hour connection in a storm-prone hub is not a saving. It is an unpriced risk, and travel insurance that actually covers missed connections is worth more than the fare difference.
