A record-breaking heatwave has placed extraordinary pressure on emergency healthcare services across south-west England, prompting the South Western Ambulance Service NHS Foundation Trust (SWASFT) to introduce dedicated summer resilience measures amid warnings that extreme heat events are becoming increasingly frequent.
The service revealed that it experienced the busiest day in its history during the UK’s hottest June day on record, responding to an unprecedented 4,350 emergency incidents in a single day. The surge has highlighted the growing impact of climate-related weather extremes on frontline healthcare services, with officials warning that the challenges traditionally associated with winter are now extending into the summer months.
Ambulance Service Records Unprecedented Demand
Speaking before North Somerset Council’s health committee, representatives from SWASFT described the pressure experienced during the June heatwave as unlike anything the organisation had previously encountered.
Officials explained that the combination of soaring temperatures and increasing frequency of heatwaves had fundamentally changed the demands placed on emergency services.
The service’s previous record had been set only one month earlier, on 26 May, when crews responded to 3,941 emergency callouts, another exceptionally busy day that also coincided with unusually warm weather. The rapid succession of two record-breaking days within weeks has reinforced concerns that prolonged periods of extreme heat are becoming a defining challenge for ambulance services.
According to SWASFT, it is not only the intensity of the temperatures that is creating difficulties, but also the recurring pattern of extreme weather events occurring throughout the season rather than during isolated periods.
Summer Planning Now Mirrors Winter Emergency Preparations
In response to the escalating pressures, SWASFT is introducing comprehensive summer planning measures similar to those traditionally reserved for the winter season, when demand for emergency healthcare typically reaches its annual peak.
The organisation is implementing a range of operational strategies designed to strengthen service resilience and ensure it can continue responding effectively during periods of exceptionally high demand.
Officials noted that scientific forecasts indicate further heatwaves are expected throughout the coming months, making proactive planning essential. Rather than treating hot weather as an occasional event, the ambulance service is increasingly preparing for sustained periods of elevated demand during the summer.
This shift reflects a broader recognition that climate-driven weather extremes are reshaping operational planning across the healthcare sector.
Public Urged to Use 999 Only for Genuine Emergencies
Despite the unprecedented workload, ambulance leaders stressed that many emergency calls received during the recent heatwave involved conditions that did not require an emergency response.
The service reported receiving numerous 999 calls related to sunburn, feeling overheated and mild dehydration resulting from alcohol consumption.
Officials urged members of the public to reserve the emergency number for life-threatening situations, warning that inappropriate calls can delay responses to patients facing genuine medical emergencies.
Healthcare professionals continue to encourage people experiencing minor heat-related illnesses to seek advice through alternative healthcare services whenever appropriate while taking preventative measures such as remaining hydrated, limiting alcohol consumption and avoiding prolonged exposure to direct sunlight during the hottest parts of the day.
More Heatwaves Forecast Across the UK
Meteorological forecasts suggest the pressure on emergency services is unlikely to ease in the immediate future.
Temperatures are expected to climb once again during the week, with some areas forecast to reach 34°C (93°F).
In response, the UK Health Security Agency has issued Amber Heat-Health Alerts covering the Midlands, eastern England and southern England from 8 July until 12 July, warning that prolonged high temperatures could pose significant health risks, particularly for older adults, young children and people with underlying medical conditions.
The latest forecasts come only weeks after the UK experienced its hottest June day on record. On 25 June, temperatures reached 36.7°C at Merryfield in Somerset before being surpassed the following day when 37.3°C was recorded in Suffolk.
Climate Change Increasing Frequency of Extreme Heat
Scientists continue to warn that climate change is making heatwaves both more frequent and more intense across the United Kingdom.
Data from the Met Office indicates that between 2015 and 2024, the number of days during which temperatures exceeded 30°C more than tripled compared with the long-term average recorded between 1961 and 1990.
Experts caution that increasingly hot summers are likely to become the norm, requiring public services, healthcare providers and local authorities to adapt to a changing climate and its associated health risks.
The growing frequency of prolonged heat events is expected to place sustained pressure on emergency healthcare systems, infrastructure and community resilience across the country.
Air Ambulance Also Reports Record Demand
The pressure has not been limited to ground ambulance services.
The Great Western Air Ambulance Charity (GWAAC), which serves Bristol, Bath and parts of Somerset, Gloucestershire and Wiltshire, confirmed that 2025 was the busiest year in its history.
Air ambulance crews attended 2,344 critically ill or seriously injured patients during the year, while the charity reported that 2026 has continued at a similarly demanding pace. Although GWAAC did not directly attribute the increase in activity to hot weather, the sustained rise in emergency incidents reflects the growing pressures facing emergency medical services across the region.
With an estimated 23 million visitors expected to travel to south-west England during the summer holiday period, emergency services are preparing for another challenging season as rising temperatures, increased tourism and changing weather patterns continue to drive unprecedented demand on frontline healthcare resources.