Heatwaves are becoming a growing concern for the NHS, with Doncaster and Bassetlaw hospitals feeling the strain. As temperatures soar, the pressure on hospital services mirrors that of the winter months, according to Zara Jones, Acting Chief Executive of Doncaster and Bassetlaw Teaching Hospitals. The heatwave is placing additional demands on staff, patients, and buildings, with A&Es nationwide bearing the brunt of the pressure. Ambulance services are also under intense demand, with paramedics experiencing levels of demand never seen outside of winter. The heat is affecting patient care, particularly for vulnerable children with chronic conditions like asthma or diabetes, as hospital buildings struggle to maintain safe temperatures. This is a critical issue that requires immediate attention, as evidenced by the Doctors' Association UK's call for a maximum safe working temperature for hospitals and GP surgeries. The median indoor temperature was a staggering 33C (91F), with temperatures reaching as high as 45C. This has led to operations being disrupted and clinical decision-making becoming more difficult. The government acknowledges the unprecedented demand, with 1.86 million attendances managed within four hours of arrival at hospital in May, the highest number for any May in a decade. However, the focus should be on addressing the root cause of the problem: the vulnerability of hospital buildings to overheating. Research by the University of Sheffield reveals that 90% of hospital buildings are at risk, which severely compromises patient care. The university's School of Architecture and Landscape is actively researching ways to combat the urgent threat of extreme heat in NHS buildings, with a goal of achieving a heat-resilient UK children's hospital system by 2050. This is a crucial step towards ensuring the safety and well-being of patients, especially during heatwaves. The hospital trust's investment in a £19m critical care unit with cooling systems is a positive step, but more needs to be done to address the broader issue of heat resilience in NHS buildings. The heatwave is a stark reminder that the NHS must adapt to changing environmental conditions to provide effective care. It is time for the government to take immediate action to protect NHS patients and staff during extreme heat, and to invest in the necessary infrastructure to ensure the safety and comfort of patients year-round.