A freedom-of-information investigation reveals that more than 1,000 operations at NHS hospitals across England and Wales were cancelled due to extreme heat conditions during record-breaking heatwaves earlier this year. The cancellations encompassed a range of procedures, including 167 orthopaedic surgeries such as knee and hip replacements, as well as heart operations, eye surgeries, and skin cancer removals. Notably, at least 10 emergency surgeries for life-threatening conditions were cancelled due to heat-related issues, and an additional 18 procedures were abandoned mid-way through operations.
The research, conducted by Carbon Brief, involved sending freedom-of-information requests to 140 NHS trusts in England and Wales. Of these, 59 trusts and health boards responded with detailed information about 1,110 heat-related cancellations spanning two periods in May and June when amber and red heat warnings were in effect. The investigation notes that the actual figure is likely substantially higher, as less than half of NHS trusts provided specific data on heat-related cancellations, with many hospitals not routinely recording such information. Geographic analysis shows the highest concentrations of cancelled surgeries occurred in areas that experienced the most extreme temperatures, particularly Surrey and Sussex, south Essex, and parts of London.
Medical experts attribute the cancellations primarily to the failure of sophisticated ventilation and air conditioning systems in surgical theatres when temperatures exceed certain thresholds. These systems are critical for removing airborne contaminants, anaesthetic gases, and controlling heat and humidity levels necessary for safe surgery. When these systems malfunction, hospitals cannot guarantee the sterile conditions required for operations, necessitating cancellations. In 48 documented cases, staff specifically cited broken or inadequate air conditioning and ventilation units as the reason for temperature-related disruptions.
Healthcare professionals emphasize the significant consequences of these cancellations beyond the immediate operational disruptions. While most cancelled surgeries were elective procedures scheduled in advance, the delays extend already lengthy waiting lists and can lead to patient condition deterioration. Medical researchers note that each cancellation causes substantial distress to patients who have often been waiting considerable periods for their procedures. The cancelled operations represent an additional strain on an NHS system already under pressure from staff shortages, insufficient beds, and record emergency department demand during the extreme heat conditions.
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