London NHS Services Under Extreme Pressure as Heatwave Drives Record Emergency Demand

NHS London warns residents about rising pressure on emergency services as extreme heat increases A&E visits and ambulance demand. Learn key heat safety tips and when to use NHS services.

Introduction

London is facing significant pressure on its healthcare services as another period of extreme heat affects the capital. NHS London has issued an urgent reminder for residents to take precautions, stay safe in hot weather, and use healthcare services appropriately.

Recent figures show that emergency departments and ambulance services experienced exceptionally high demand during the previous heatwave period. With temperatures continuing to rise and major public events bringing large crowds together, health leaders are encouraging Londoners to protect themselves, support vulnerable people, and seek medical help through the right channels.

Extreme heat can affect people of all ages, but older adults, young children, people with existing health conditions, and those who spend a lot of time outdoors are particularly at risk.

NHS London Reports Rising Pressure on Emergency Services

New NHS figures reveal that London recorded more than 428,000 A&E attendances and over 130,000 ambulance incidents during June 2026. The increase came during a month that ended with a period of intense heat across the capital.

During the heatwave, London Ambulance Service experienced its highest-ever daily demand, responding to more than 8,800 emergency calls on Friday 26 June 2026. At the busiest point, ambulance teams were receiving around 500 calls every hour.

Healthcare leaders have highlighted that while NHS teams continue to provide care for everyone who needs it, the pressure on emergency services remains extremely high.

Dr Chris Streather, Regional Medical Director for NHS London, explained that demand increased significantly during May and June, with thousands more people attending A&E departments and additional ambulance incidents compared with previous months.

He thanked NHS staff across London for their continued dedication during one of the most challenging periods for healthcare services.

Why Hot Weather Creates Health Risks

High temperatures can place extra stress on the body. When the weather becomes extremely hot, people can experience dehydration, heat exhaustion, heatstroke, worsening long-term health conditions, and increased risks for those who are already vulnerable.

Common signs of heat-related illness include:

• Feeling dizzy or weak
• Excessive sweating
• Headaches
• Nausea
• Confusion
• Fast breathing or increased heart rate
• Extreme tiredness

Heatstroke can become a medical emergency. If someone becomes confused, loses consciousness, or develops severe symptoms after exposure to heat, emergency assistance should be sought immediately.

However, not every health concern requires an ambulance or an emergency department visit. Using the correct NHS service helps ensure emergency teams remain available for people facing serious or life-threatening situations.

Simple Ways to Stay Safe During a Heatwave

NHS London is encouraging residents to take practical steps to reduce the risks linked to extreme temperatures.

Stay Cool During Peak Heat Hours

Try to avoid spending too much time outdoors during the hottest part of the day, especially between 11am and 3pm. If you need to go outside, look for shaded areas and take regular breaks.

Wearing loose, lightweight clothing can also help your body manage high temperatures. A hat and sunglasses provide additional protection when spending time outdoors.

Keep Drinking Fluids

Dehydration can happen quickly during hot weather. Drink water regularly throughout the day and do not wait until you feel thirsty.

It is also recommended to limit alcohol and avoid excessive caffeine, as these can contribute to dehydration.

Protect Your Skin

Sun exposure can increase the risk of skin damage. Use sunscreen with SPF 30 or higher and apply it regularly, especially if you are spending extended periods outside.

Look After Vulnerable People

Extreme heat can be particularly dangerous for older adults, people living with health conditions, babies, and those who live alone.

Check on family members, friends, neighbours, or anyone who may need extra support during periods of high temperatures.

A simple phone call or visit can help identify problems early and prevent serious health issues.

Use NHS Services Wisely During Busy Periods

NHS London is asking residents to choose the most suitable healthcare service for their needs.

For non-emergency health advice, people can use NHS 111 online or call NHS 111. The service can provide guidance, arrange appropriate care, and direct patients to the right place.

People experiencing mental health difficulties can also contact NHS 111 and select option 2 for urgent mental health support.

For serious or life-threatening emergencies, such as severe breathing difficulties, loss of consciousness, major injuries, or symptoms of a stroke or heart attack, people should always call 999.

Using emergency services responsibly helps protect vital resources for those who need immediate care.

Preparing for Heat and Major Events in London

Large public events can increase pressure on healthcare services, particularly when combined with extreme weather conditions. Crowds, outdoor activities, alcohol consumption, and prolonged sun exposure can all increase the risk of heat-related illness.

Residents attending events are encouraged to plan ahead by carrying water, wearing suitable clothing, applying sunscreen, and checking on friends and family members.

Staying aware of your surroundings and recognising early signs of heat-related illness can help prevent situations from becoming emergencies.

Supporting NHS Staff During Challenging Times

NHS workers across London continue to provide essential services despite periods of unusually high demand. Emergency departments, ambulance crews, and healthcare teams work around the clock to support patients and maintain safe care.

By taking simple precautions, seeking advice early, and choosing the right healthcare service, London residents can help reduce unnecessary pressure while ensuring emergency support remains available for those who need it most.

Conclusion

Extreme heat can create serious health risks and place additional strain on emergency services. As temperatures remain high across London, residents are encouraged to stay hydrated, protect themselves from the sun, support vulnerable people, and use NHS services appropriately.

Small actions, such as drinking enough water, avoiding peak heat, and seeking advice early, can make a significant difference during a heatwave.

The NHS remains available for everyone who needs care, but choosing the right service at the right time helps ensure that emergency teams can continue responding to the most urgent situations.

Disclaimer: This article is for general information purposes only and is based on publicly available NHS announcements and guidance. It does not replace professional medical advice, diagnosis, or treatment. If you have a medical concern, contact an appropriate healthcare professional or use official NHS services for guidance.