The London Ambulance Service (LAS) is reminding people to only call 999 in a life-threatening emergency, as experts forecast that May Day temperatures could be the warmest so far in 2025.
The LAS has been very busy following the high temperatures at the start of the week and an unusually warm end to April.
Since Sunday, the service has taken around 6,000 calls to 999 every day, which is an additional 1,000 calls a day compared to the same period last month.
The warm spell coincides with the arrival of a bank holiday weekend, which also sees 999 call volumes increase if people are unable to access the usual healthcare support.
Alison Blakely, deputy chief paramedic and gold commander at LAS, said: “The hot weather and high pollen count can have a significant impact on people’s health, and we are prepared for an increase in calls relating to difficulty in breathing, dizziness and fainting, as well as more calls relating to chest pains and heart problems.
“Older people, the very young and people with pre-existing conditions are more at risk in hot weather – so please look out for neighbours, family or friends who may need some help and make sure they are able to keep cool during the heat.
“Please be aware of the dangers of spending too long in the sun and the health risks of hot weather.
“Avoid prolonged exposure to direct sunlight – especially between 11am and 3pm when the sun’s UV rays are at their strongest.
“Try to stick to shade and wear sun cream.”
Ms Blakely also emphasised the importance of staying hydrated in the warmer weather, advising people to take a bottle of water with them if they are heading out.
She also urged people to be sensible if they are drinking alcohol, suggesting they have a meal and try to also have soft drinks.
Ms Blakely said: “During periods of hot weather, we know our services will be busier than usual and we take action to reduce any adverse impact, such as extra ambulance crews out on the road and additional call handlers in our control rooms.”
She concluded by asking people to follow advice, use the service wisely and contact their GP, pharmacy or NHS 111 where possible.
She also reminded Londoners to ensure they have the medication they need with them.
