The health secretary has told the NHS in England to plan for summer heatwaves in the same way it prepares for winter, after a season in which hospitals declared critical incidents, scanners failed and A&E departments recorded levels of demand normally seen only during flu season.
Yvette Cooper, who took over the health brief on 20 July, said on Thursday that the government would use its investment in NHS infrastructure to improve the health service's resilience to high temperatures, with the cooling of hospitals and other facilities a central part of that spending. She also called on the public to check on elderly relatives and those with young babies during hot weather.
The intervention is the first attempt by a minister to build summer planning into the NHS operating cycle in the way that winter planning has been for decades, and follows a run of heatwaves across England since May that has pushed heat-associated deaths close to the highest total on record.
Speaking to LBC, Cooper said: "I spoke to A&E staff who were telling me that they've had a big increase in patients coming into A&E linked to the heat in a way that you would normally only see in the winter." She added: "So I've been clear: the NHS has to make sure we are preparing for summer pressures now in the same way we prepare for winter."
In an interview with the Guardian, she said rising global temperatures were creating problems the health service had not faced before.
"This is a new thing for the NHS to have to deal with. There is a remarkable determination of the NHS to respond, but we need much greater resilience."
Cooper said she had visited her local A&E in Yorkshire, where staff described overcrowding during the heat. "It would be normal during the winter weeks and months, but not in the summer, to have the very high attendances that they have had," she said. She told Times Radio that heat-health warnings had been issued at different times in different areas because of the impact on the frail, elderly and vulnerable.
The health secretary said she had discussed a public awareness campaign with the chief medical officer, Sir Chris Whitty, arguing that alongside plans to cope with higher A&E numbers, "it also needs much stronger prevention – we know that it's the elderly and vulnerable who are at risk when you have these heatwaves".
Interim figures published by the UK Health Security Agency on 30 July estimated 2,877 heat-associated deaths in England across two episodes in May and June — 753 between 24 and 27 May and 2,124 between 21 and 28 June. That is almost double the total reported for the whole of 2025 and sits 108 below the record 2,985 deaths recorded in 2022. The figures are modelled from early death registrations and exclude a further heatwave in July. Final numbers are due in early 2027.
Hospitals have also struggled physically. Queen Alexandra Hospital in Portsmouth declared a critical incident on 24 June after chiller units supporting theatres, cardiac catheter laboratories and diagnostic scanning failed. Norfolk and Norwich University Hospitals said the following day it had no working MRI scanners across its Norwich sites, cancelling at least 254 outpatient appointments. London Ambulance Service declared a critical incident on 26 June after its busiest day on record, taking 8,869 calls.
Clinical bodies have been pressing for months for a national response. The Royal College of Physicians has called for an extreme-weather resilience plan covering buildings, ventilation and patient flow, while the Royal College of GPs advised practices on 4 August to consider closing or relocating if indoor temperatures exceed 30C. The NHS maintenance backlog stands at £15.9bn.
The Department of Health and Social Care has not put a figure on the money earmarked for cooling, and NHS England has yet to confirm whether it will issue formal summer planning guidance. Cooper's remit covers England only. A fifth heatwave was forecast for parts of southern England this week.
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