Nurses fainting on their own wards. Nurses being admitted to the hospitals they work in after collapsing from dehydration. Nurses with pre-existing conditions reporting seizures brought on by heat that had nowhere to go because the ventilation had failed and the windows would not open. These are not isolated accounts gathered from a handful of disgruntled staff. They come from a Royal College of Nursing advice line that has spent this summer compiling testimony from members working in rooms measured at 36C, in wards described by the people inside them as "not fit for humans." The RCN's general secretary, Professor Nicola Ranger, called the conditions inhumane. It is a strong word for a trade union to use about the institution its members serve, and it was not chosen carelessly.

What makes this moment different from previous hot summers is not the temperature alone, since Britain has had severe heat before, but the emergence of a specific and awkward admission from within the government itself. Yvette Cooper, the health and social care secretary, said this week that the NHS now needs to plan for summer pressures in the way it currently plans for winter ones. It is a candid line, and also a damning one, because it confirms that no such planning has existed. Winter pressure is not a metaphor inside the NHS. It is an operational category, with escalation levels, surge protocols, ringfenced funding settlements and a public information campaign that dates back decades. Estate managers know what a bad January looks like before it arrives. Nothing comparable exists for a ward hitting 36C in August, because heat resilience was never built into NHS capital planning as a recurring, budgeted risk. It was treated as weather.

That gap now has a cost attached to it, and not only in the discomfort of staff. Wards without functioning ventilation compromise the cold chain for medication. Pregnant staff and those with underlying health conditions are being placed in situations the RCN says employers have a legal duty to mitigate, and in many cases are not. Patient safety and workforce safety are, in this context, the same problem viewed from two directions, which matters because NHS trusts under financial pressure will always find it easier to defer capital spending on ventilation and cooling than to defer clinical activity. Estate resilience loses that argument by default unless someone forces it onto the agenda with the same institutional weight as winter surge funding.

The political backdrop makes that harder rather than easier. Andy Burnham, chairing the government's Cobra committee this week, framed his response almost entirely around the immediate incidents, wildfires, drought, transport disruption, while deferring what he called the bigger questions to some unspecified later point. Some of his own backbenchers, including Chris Hinchliff, have pushed back directly, arguing that a country built for a climate that no longer exists is now seeing that mismatch play out in its railways, its schools and its hospitals. The figures give that argument teeth. A freedom of information request has established that only twenty of the roughly 6,600 staff at the Department for Environment, Food and Rural Affairs work on climate adaptation, a department that holds lead responsibility for the national plan the NHS and every other public service is meant to be adapting against. Twenty people cannot be expected to underwrite the resilience of a health system serving a population of nearly seventy million.

For NHS leaders the practical implication is that heat resilience needs to become a named line in capital planning cycles rather than an emergency response triggered afresh each July, and that means competing for money in a Budget on 28 October that is already stretched by elective recovery targets and workforce costs. It is a hard case to win against more visible priorities. But the alternative, judging by this summer's testimony, is a workforce that treats its own workplace as a hazard, and a health service discovering its resilience gaps one collapsed nurse at a time. Winter proved decades ago that the NHS can plan for a predictable seasonal threat when it decides to. Summer has just shown what happens when it has not yet decided to.