NHS Faces Record Summer Pressure as Five Heatwaves Push A&E Attendances to All-Time High

England’s NHS endured its most demanding summer on record as five successive heatwaves drove nearly 7.3 million people through A&E doors, according to figures published by NHS England. The unprecedented surge in demand across emergency departments, ambulance services and the NHS 111 advice line has prompted urgent warnings that extreme weather is now a permanent feature of the health service’s operating landscape.

Record-Breaking Demand Across Every Front

The numbers tell a stark story. Almost 7.3 million people attended A&E units across England during June, July and August, the highest seasonal figure ever recorded. The total of 7,268,445 attendances exceeded the same period in 2025 by 240,000, and represented nearly a million more presentations than in the summer of 2022.

Ambulance services were similarly overwhelmed. A record 2.46 million callouts were logged over the three-month period, up from 2.32 million in the corresponding months of 2025. Meanwhile, the NHS 111 telephone advice line answered just over 3 million calls — more than 100,000 additional contacts compared with the previous year.

These figures reflect the cumulative toll of five distinct heatwave episodes that struck Britain during the summer months. With August confirmed as the world’s joint hottest month on record, the pressure on frontline services showed no sign of abating.

A “Twin Crisis” for the Health Service

Health experts and leaders are now describing the situation as a “twin crisis,” with summer joining winter as a period of intense and sustained pressure on NHS resources. Sarah Woolnough, chief executive of the King’s Fund thinktank, said the growing climate emergency had fundamentally altered the demands placed on the health service.

“Extreme heat is now an NHS pressure point, not just a weather story,” she said. “The NHS is now facing a twin crisis, with summer joining winter as a major pressure on services and leaving little room for staff and the system to recover between peak periods.”

Woolnough pointed to climate change as a central driver, noting that as record-breaking heatwaves become more frequent, their consequences for both public health and the health system are becoming impossible to ignore. The observation carries particular weight given that almost 75% of A&E staff across the UK already report facing violence or aggression on a daily or weekly basis.

Professor Frankie Swords, NHS England’s national medical director, acknowledged the severity of the challenge while praising staff resilience. “Despite a scorching summer which has tested the NHS like never before and seen demand rocket to record levels, staff have risen magnificently to the challenge to deliver for patients,” he said.

Respiratory Illnesses Among the Leading Drivers

The health consequences of prolonged extreme heat extend well beyond heatstroke and dehydration. Respiratory conditions emerged as a significant contributor to the surge in emergency admissions, with breathing problems already the leading cause of hospital visits in England.

Andrew McCracken, director of external affairs at Asthma + Lung UK, explained the compounding factors at play. “As temperatures rise it becomes harder to breathe. Layer on top smoke from wildfires, pollution trapped by the high pressure and a longer pollen season and people with lung conditions like asthma and chronic obstructive pulmonary disease are facing a barrage of potential triggers,” he said.

The charity’s concerns underscore a broader understanding that heatwaves do not affect the population uniformly. Older adults, those with pre-existing respiratory or cardiovascular conditions, and vulnerable communities bear a disproportionate share of the burden.

Government Response and the Waiting List Challenge

Health Secretary Yvette Cooper has acknowledged that extreme temperatures now pose a structural challenge to the NHS. She confirmed that £1.5 billion of NHS funding would be directed towards expanding hospital capacity, including the construction of new operating theatres, children’s wards and improved maternity units. Measures to “heat-proof” the health service were also announced, though the Department of Health and Social Care confirmed that only £32 million of the £1.5 billion package would be earmarked specifically for heat-related adaptations.

The Department has additionally established a dedicated heat taskforce charged with developing strategies to help the NHS cope with future periods of extreme weather. The move comes as many hospitals struggled to maintain standards of care throughout the summer months.

Compounding the concern, Thursday’s data revealed that the NHS waiting list in England rose to 7.3 million in July — the highest level since the previous October. This upward trend casts serious doubt over the government’s commitment to treat 92% of patients on the waiting list within 18 weeks by 2029, a target that now appears increasingly difficult to achieve.

Why it Matters

The summer’s figures represent a watershed moment for the NHS and for British public health policy. Climate change is no longer a distant environmental abstraction — it is reshaping the demands placed on the country’s healthcare infrastructure in real time, with tangible consequences for patients, staff and taxpayers alike. The fact that only £32 million of a £1.5 billion package is dedicated to heat-proofing hospitals raises uncomfortable questions about whether the government is preparing adequately for a future in which extreme summers become the norm rather than the exception. As waiting lists climb and emergency departments operate beyond capacity for longer periods, the pressure on politicians to develop a coherent, long-term strategy for climate-resilient healthcare has never been greater. The health of the nation depends on it.