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UK heat health warning upgraded to amber with day declared hottest of the year so far

Alamy Live News. 3BKA0CX London, UK. 19 June 2025. Tourists on Westminster Bridge cover their heads from the hot sun as temperatures are expected to reach 32 Celsius by Friday in London and England. Credit Amer Ghazzal/Alamy Live News This is an Alamy Live News image and may not be part of your current Alamy deal . If you are unsure, please contact our sales team to check.
People trying to shelter from the sun on Westminster Bridge today (Picture: Alamy Live News.)

The sun is out, we’re all sweating cobs and it’s the hottest day of 2025.

That’s the message from the Met Office after a health agency issued an amber heat warning, meaning there’s potential for it to be dangerously hot.

A top temperature of 32.2°C was recorded in Kew in London on Thursday, meaning today is officially the hottest day of the year so far.

Basically, it’s hot enough to fry an egg on the pavement, which is great news if you like an al fresco all day breakfast, but not so great if you’re a dog burning your paws on the tarmac.

It may sound great for barbecues, but the UK Health Security Agency is warning that this heat could be dangerous – especially for older people or anyone with existing health issues – and it’s only going to get hotter.

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Suffolk has officially been named the first place in the UK to enter a heatwave, after temperatures passed 27°C for the third day in a row.

LONDON, UNITED KINGDON - JUNE 19: Portuguese tourists Miriam and her dad cool down in a sprinkler in Parliament Square on June 19, 2025 in London, United Kingdom. Yellow heat health alerts have been issued by the Met Office with temperatures set to climb as high as 33C by the weekend. (Photo by Dan Kitwood/Getty Images)
Portuguese tourists Miriam and her dad cool down in a sprinkler in Parliament Square (Picture: Dan Kitwood/Getty Images)

The alert, which covers all of England and runs until 9am on Monday, means there’s an increased risk of illness or even death. Temperatures in hospitals and care homes are also on the rise and may soon be above safe levels.

Dr Agostinho Sousa, from the UKHSA, said: ‘The forecasted high temperatures are expected to be short-lived but could primarily impact those over the age of 65 or those with pre-existing health conditions.

‘If you have friends, family or neighbours who are more vulnerable, it is important to check in on them and ensure they are aware of the forecasts and are following the necessary advice.’

How to stay cool

  • Close windows and curtains in rooms that face the sun
  • Wear suitable clothing, seek shade and apply sunscreen regularly if going outside
  • Stay out the sun between 11am and 3pm, the hottest time of the day
  • Plan outdoor physical activities for cooler times of day like morning and evening
  • Drink cold drinks – weird but true: milk might hydrate you better than water, Medichecks’ Dr Natasha Fernando told Metro
? Licensed to London News Pictures. 19/06/2025. London, UK. Women travelling to Ladies Day At Royal Ascot cool off in front of a large fan at a London Underground station as the mini-heatwave continues. Temperatures on the trains and in the Underground are higher than at ground level. A yellow heat warning has been issued for London, with temperatures expected to soar to 33?C as a heatwave sweeps across the UK. Photo credit: Dinendra Haria/LNP
Women travelling to Ladies Day At Royal Ascot take advantage of a large fan at a Tube to cool down (Picture: Dinendra Haria/LNP)
LONDON, UNITED KINGDON - JUNE 19: A woman dances on a Statue of the Sphinx next to the River Thames on June 19, 2025 in London, United Kingdom. Yellow heat health alerts have been issued by the Met Office with temperatures set to climb as high as 33C by the weekend. (Photo by Dan Kitwood/Getty Images)
A woman soaks up the sun with a Sphinx beside Cleopatra’s Needle in London (Picture: Dan Kitwood/Getty Images)
Horse Racing - Royal Ascot 2025 - Ascot Racecourse, Ascot, Britain - June 19, 2025 Racegoers pose for a photograph as they queue to enter Royal Ascot REUTERS/Toby Melville
…and attendees had to make do with smaller fans after arriving at Ascot (Picture: Reuters)

Meanwhile, London Fire Brigade is warning people, particularly the young, to resist the urge of cooling off in rivers and lakes.

There’s already been a 15% increase in the number of incidents this year – more than 280 so far – including rescues from strong currents, mud and capsized boats.

Assistant commissioner Pam Oparaocha, said: ‘With warm weather and school holidays on the horizon, we want people, especially young people, to enjoy our waterways safely, and that starts with education.

‘It’s important to know the risks and to familiarise yourself with lifesaving equipment like throwlines, which are available along many of London’s waterways.’

People enjoy the sunshine on Jubilee Beach in Southend. Temperatures could hit 33C this weekend as parts of the UK bask in a heatwave. Picture date: Thursday June 19, 2025. PA Photo. Warnings have been issued over the dangers hot temperatures can bring as parts of the UK brace for a heatwave this weekend. Temperatures are expected to reach 31C on Thursday and Friday, before peaking at 33C on Saturday, Photo credit should read: Lucy North/PA Wire
Having a sunbathe-cum-snooze on Southend’s Jubilee Beach (Picture: Lucy North/PA Wire)
A group of people sunbathe at The Hard in Portsmouth, near the HMS Warrior, during the warm weather. Temperatures could hit 33C this weekend as parts of the UK bask in a heatwave. Picture date: Thursday June 19, 2025. PA Photo. Warnings have been issued over the dangers hot temperatures can bring as parts of the UK brace for a heatwave this weekend. Temperatures are expected to reach 31C on Thursday and Friday, before peaking at 33C on Saturday, Photo credit should read: Ben Mitchell/PA Wire
Living the easy life at The Hard in Portsmouth (Picture: Ben Mitchell/PA Wire)
LONDON, UNITED KINGDON - JUNE 19: A group of tourists from France relaxes in the dappled shade in St James's Park on June 19, 2025 in London, United Kingdom. Yellow heat health alerts have been issued by the Met Office with temperatures set to climb as high as 33C by the weekend. (Photo by Dan Kitwood/Getty Images)
Visitors from France cram into the shade in St James’s Park, London (Picture: Dan Kitwood/Getty Images)

Will there be a heatwave this weekend?

In order for a heatwave to be made official, the Met Office says several conditions must be met.

The peak temperature must exceed a certain level for at least three days in a row, and that level changes depending on where you are in the country.

In north and west parts of the UK, the threshold is 25C, while in Greater London and the Home Counties it’s up at 28C.

Met Office Deputy Chief Meteorologist Tony Wisson said: ‘Over the next few days, settled weather and warm sunshine will allow temperatures to rise day on day.

‘Temperatures will then rise further towards the end of the week as winds turn more southerly and even warmer air over continental Europe will be drawn across the UK.

‘We could very well see several places exceeding 30ºC, which will be the highest temperatures of the year so far.’

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