UK Braces for Deadly Heatwave as Temperatures Soar to 34°C

By M10News Weather Desk
Published: June 21, 2025
© 2025 M10News.com | All rights reserved

LONDON — A powerful heatwave sweeping across the United Kingdom is expected to peak today, Saturday, June 21, with forecasters predicting highs of 34°C — dangerously close to the all-time June record of 35.6°C, set in 1976.

According to the UK Health Security Agency (UKHSA), up to 600 deaths are expected during the current heat spike, with London and the West Midlands identified as the most vulnerable regions.

Multiple health alerts issued alongside a yellow warning for thunderstorms across affected regions

“Our findings show that heat can result in serious health outcomes across the population,” said Dr Agostinho Sousa, Head of Extreme Events and Health Protection at the UKHSA. “Older adults and people with existing health conditions are especially at risk.”

From 2020 to 2024, summer heatwaves caused more than 10,000 premature deaths across the UK, the agency warned. As temperatures climb, care homes and hospitals are also reporting internal heat levels nearing unsafe thresholds.

“Individual shields from the heat with a towel while sitting in Victoria Embankment Gardens (Photo: Jordan Pettitt/PA Wire)”

🔥 Wildfire Risk and Water Dangers Rising

The London Fire Brigade issued an urgent wildfire warning, citing a 15% increase in emergency incidents this year — with over 280 reported cases involving strong currents, capsized boats, and heat-related rescues.

“As we approach school holidays, it’s essential young people are aware of the risks,” said Assistant Commissioner Pam Oparaocha. “Throwlines and other lifesaving tools are available along many of London’s waterways. Learn where they are — it could save a life.”

🧊 How to Stay Cool and Safe During Extreme Heat

Health and safety officials are urging the public to take precautions:

Close windows and curtains in sun-facing rooms to keep interiors cooler.
Stay out of the sun between 11am and 3pm, the hottest part of the day.
Wear light, breathable clothing and reapply sunscreen regularly.
Stay hydrated — and don’t overlook alternatives. ““Milk might hydrate you better than water,” said Dr Natasha Fernando, a clinical expert at Medichecks.
According to Dr Fernando, milk may hydrate more effectively than water in certain conditions, such as after exercise or during heat exposure. This advice was originally published in Medichecks’ hydration guidance and shared with M10News.
Plan outdoor activities during cooler hours, like early morning or evening.

A person covers their head with a towel in Victoria Embankment Gardens (Picture: Jordan Pettitt/PA Wire)

Authorities are urging residents to check in on elderly neighbours and relatives, especially those living alone, and to be alert for signs of heatstroke or dehydration.

A child plays in a fountain in London, as a heatwave passes through the capital (Picture: AP)

As heatwaves grow more frequent and severe due to climate change, public health officials say the UK must adapt quickly — not only through awareness, but by investing in infrastructure, emergency planning, and heat-resilient buildings.