A second amber heat health alert has been issued in as many weeks, with temperatures again set to pass 30C over the weekend.
The alert, which covers London, the East Midlands, South East, South West and East of England, starts at midday on Friday and will last until 6pm on Tuesday.
The UK Health Security Agency (UKHSA) also issued a yellow alert for Yorkshire and Humber and the West Midlands for the same time period, with the agency warning of significant impacts across health and social care services.
It comes as unsettled conditions on Thursday and Friday will still see temperatures steadily rise, with highs potentially reaching 28C in the south and east by Friday.
Temperatures are expected to peak on Monday when much of the country will see temperatures in the early to mid-30s, the UKHSA said.
An amber alert was previously issued for all regions in England on June 19, the first time it had been used since September 2023.
Some places could reach heatwave criteria over the coming few days 🥵
— Met Office (@metoffice) June 25, 2025
Here are your forecast highs for this weekend 👇 pic.twitter.com/hTuMwjZ7H3
On the same day the UK recorded its warmest day of the year so far, with temperatures reaching 32.2C in Kew, west London, before heatwaves were declared across England and Wales.
An official heatwave is recorded when areas reach a certain temperature for three consecutive days, with thresholds varying from 25C to 28C in different parts of the UK.
Dr Agostinho Sousa, head of extreme events and health protection at the UKHSA, said: “We have already seen a spell of hot weather last week and temperatures are once again set to increase in the coming days, with central, southern and eastern areas of the country likely to see the biggest impacts.
“Our findings show that heat, especially at the sort of temperatures we are likely to see at the beginning of next week, can result in serious health outcomes across the population, especially for older adults or those with pre-existing health conditions.
“It is therefore important to check on friends, family and neighbours who are more vulnerable and to take sensible precautions while enjoying the sun.”
Thunderstorms are possible with warm, humid air set to linger in the south and east on Thursday, with maximum temperatures of 27C in eastern England, the Met Office said.
But temperatures are unlikely to feel “quite as muggy”, meteorologist Honor Criswick said.
“For the first part of the day, it is set to be unsettled (with) outbreaks of quite heavy rain at times, particularly across Scotland,” he said.
“But it’s fairly fast moving, so by the time we reach the afternoon, particularly from the west, we’re going to see the return of those bright and sunny spells.
“And behind this area of rain, a much fresher feel to the air as well.”
On Friday, forecasters said the unsettled conditions look set to continue.
According to the Met Office, rain could be heavy in the west, while the east of England could remain dry, escaping with some sunny intervals.
Parts of the south and east may also remain very warm, with highs potentially reaching 28C as the muggy air returns.
Ms Criswick said: “For the rest of the week, we do have a ridge of high pressure building to the south, so once again pushing in a return of that warmer air.
“So, that fresher feeling day as we head into Thursday, it’s going to be quite a brief interlude.
“And low pressure is never too far behind, so still some rain on the cards to finish off the week and as we head into the weekend.”
The National Pharmacy Association (NPA) has advised patients to store their medicine away from heat zones and direct sunlight, warning that they can lose effectiveness or cause unwanted side effects.
Vice-chairwoman and pharmacist Sukhi Basra said: “It’s important we take sensible precautions, including double-checking that your medication is stored correctly in a cool dry place, as per any storage instructions, ideally below 25C, as well drinking plenty of fluids and keeping your homes cool in the hottest hours of the day.
“We know the hot weather can be more of a challenge for older people or those with certain health conditions and it’s important people check on vulnerable friends, family and neighbours during this period.
“If anyone has concerns at all about their health or their medication, please speak to your local pharmacy, who will be well placed to help.”
