London Ambulance Service records emergency call surge during heatwaves
London’s ambulance crews faced one of their most demanding periods in recent years as repeated heatwaves pushed emergency calls beyond levels seen during the height of the Covid-19 pandemic.
Figures released by the London Ambulance Service (LAS) show that more than 53,000 emergency calls were made during the June heatwave alone, prompting the deployment of an additional 600 ambulance crews across the capital. Paramedics responded to a wide range of serious incidents, including cardiac arrests, breathing difficulties and patients whose existing health conditions became critical in extreme temperatures.
The pressure has continued through the summer. Across June and July, LAS handled more than 403,000 emergency calls, around 25,000 more than during the same period last year. On some days, control rooms received around 6,000 calls, significantly above the seasonal average of about 5,500.
LAS strategic commander Alex Ewings said hot weather places extra strain on vulnerable residents, particularly older people and those living with long-term medical conditions. He urged Londoners to check on relatives, neighbours and friends during periods of extreme heat, while also taking simple precautions such as staying hydrated and limiting alcohol consumption.
The capital has experienced five heatwaves during 2026, leading emergency services to repeatedly review staffing levels and operational plans to ensure enough crews are available when demand rises sharply.
Health officials are also warning that high temperatures create wider risks beyond heat exhaustion. Dr Yimmy Chow, London regional deputy director at the UK Health Security Agency, encouraged people to avoid direct sunlight during the hottest part of the day and keep homes as cool as possible.
Officials also warned against underestimating the dangers of open water. Rivers and lakes can remain cold even during hot weather, creating a risk of cold-water shock that can affect breathing and swimming ability.
An Amber Heat-Health Alert remains in force as temperatures in London are forecast to reach the mid-30s. Residents are being encouraged to take precautions and support vulnerable people to reduce pressure on health services.
For practical advice on coping with hot weather, readers can also see Eye On London’s coverage of the Amber Heat-Health Alert affecting London and guidance on using fans safely during extreme temperatures.
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