“Like most buildings in London,” organisers said, the venue lacked cooling systems, making it unsafe to host gatherings during the extreme weather.
Organisers said safety had to come first
A spokesperson for the Zurich Climate Resilience Alliance said the decision came down to the welfare of attendees.
“The magnitude of future impacts from extreme heat will largely depend on global mitigation efforts, local heat governance, and response plans,” the spokesperson said.
They added that cities such as London still have real scope to improve how they prepare for rising heat risks.
“Cities like London have unique potential to adapt to changing heat risks through effective risk management at multiple levels, connecting policies and incentives, and strengthening community adaptation capacity.”
The decision turned the event into an unwanted practical demonstration of its own subject matter. It also underlined a basic problem facing older, cooler-climate cities: many were not built for heat that now arrives more often, lasts longer, and strains systems designed for a different era.
A speaker said the decision showed the pace of change
Chris Anderson of Practical Action, who had been scheduled to speak at the event, said he supported the cancellation.
“But it shows that extreme weather is becoming unpredictable and moving faster than people can adapt, even in the richest countries,” he said.
That point is likely to resonate beyond conference organisers and climate specialists. For residents, commuters, school staff, and anyone trying to work in overheated buildings, adaptation is not an abstract policy phrase. It is whether transport runs, classrooms stay open, homes remain safe, and public buildings can function when temperatures rise.
Heat caused disruption across southern England
The London event was not the only thing affected. The heatwave brought widespread disruption across southern England, including:
- Hundreds of schools fully or partly closing
- Transport for London warning that very high temperatures could affect Tube services
- Possible disruption to London Overground and Elizabeth line services
- Network Rail warning of risks to tracks, overhead lines, and signalling equipment
Network Rail urged people to “only travel if absolutely necessary to, from or within red warning zones” and reminded passengers to stay hydrated.
António Guterres warned London was “cooking”
At another London Climate Action Week event on Tuesday, United Nations Secretary General António Guterres used the conditions in the capital to make a broader point about the climate crisis.
“London isn’t just calling. It’s cooking,” Guterres said. “Crisis brings clarity, and here in London it is clear that our world is facing a ‘tale of two crises’.”
The cancelled session was a small moment in a much larger heat emergency. Even so, it landed with uncomfortable precision: a discussion about how cities should adapt to extreme heat was stopped because one of the world’s major cities could not safely host it in extreme heat.
