The UK is having a late summer burst of hot weather – while parts of the Mediterranean have been experiencing a phenomenon known as a “heat dome”, forecasters say.
Temperatures in Britain could soar as high as 32C (90F) this week, as much as 4C (39F) higher than Ibiza.
Here, Sky News looks at what is causing the unusually warm conditions in the UK and elsewhere in Europe – and whether we are set for an official heatwave.
Image: People enjoy the hot weather in London’s St James’s Park
What is a heat dome?
A heat dome is loosely defined as an area of high pressure that stays over the same area for days, or even weeks.
Hot air is trapped underneath like a lid on a saucepan, pushing temperatures above what’s normal for the time of year.
The heated air expands upwards into the atmosphere, then high pressure from above acts as a lid, meaning it can’t escape and causes the air to subside or sink – creating a dome effect, the Royal Meteorological Society said.
As the warm air sinks, it compresses and heats up, which then traps more heat underneath and clouds are pushed around it, keeping the heat in even more.
The Met Office says heat domes encourage temperatures “to keep building day on day”.
However, Sky weather meteorologist Dr Chris England said the phenomenon “doesn’t really apply to the current heat of the UK”.
He said that while a heat dome “has been relevant to some of the Mediterranean heat”, the high pressure affecting the UK “is well to the east”.
“Instead, the flow around the high pressure is generally from the south over the UK, bringing heat up from the Mediterranean and north Africa,” Dr England added.
The Met Office says tropical storms in the far western Atlantic, and deep areas of low pressure, have helped to amplify the jet stream over the Atlantic Ocean and has led to high pressure “dominating over the UK”.
Is the UK set for an official heatwave?
The word “heatwave“is often used to describe any period of sunny weather, but the Met Office defines it as “an extended period of hot weather relative to the expected conditions of the area at that time of year”.
It says the UK experiences a heatwave when it has at least three consecutive days with daily maximum temperatures meeting or exceeding the heatwave temperature threshold – and this threshold varies by UK county.
Sky weather forecaster Kirsty McCabe said official heatwave conditions “will be met this week as temperatures soar over the next few days with a late blast of summer heat, especially for southern parts of the UK.”
The peak is likely to occur on Wednesday and Thursday with 31C (88F) or even 32C (90F) possible.
The threshold temperature ranges from 25C (77F) in Scotland and Northern Ireland, to 28C (82F) in London and the Home Counties.
But Ms McCabe said “it’s not just hot weather heading our way, a Saharan dust plume will cross the UK, bringing some spectacular sunrises and sunsets”.
Hitting 30C in September “used to happen around once every seven years or less, but has occurred more frequently in the last decade,” she said.
Could we have the hottest day of the year this week?
This year’s highest temperature is 32.2C (90F) at Chertsey on 10 June and Coningsby on 25 June.
Ms McCabe said: “There is a chance we could exceed that this week [Wednesday or Thursday].”
The highest September temperature ever recorded in the UK was 35.6C (96F) in South Yorkshire in 1906.
Is this an Indian summer?
According to the Met Office Meteorological Glossary, an Indian summer is a warm, calm spell of weather that occurs in autumn, “especially in October and November.”
There is, the Met Office says, no statistical evidence to suggest that such warm spells recur at any particular time each year – warm spells during the autumn months are not uncommon.
How long will the UK’s hot weather last?
An amber alert is in place for the whole of England except the North East, where a yellow alert is in place.
The alert, issued by the UK Health Security Agency and the Met Office, is in place until 9pm on 10 September.
Temperatures reached 30C on Monday in southern England and the southeast of Wales, according to the Met Office – and the hot weather will continue through Tuesday, with highs of 31C (88F) expected.
Met Office spokesperson Oli Claydon said: “We will see good sunny conditions through the week with cloudless skies, and some high temperatures by the time we get to Wednesday and Thursday, where we could see 31 maybe 32 degrees.”
The Met Office said temperatures could also hit 31C (88F) on Friday, although there could be more cloudy weather and chances of rain in the far northwest of Scotland.
But the weather conditions could change over the weekend and Mr Claydon said there is “no indication at the moment of another strong heatwave after this”.
He added: “Through the weekend, we start to see some heavy, potentially thundery, showers developing but (they are) only isolated. There is a little bit of uncertainty as we start to get that far ahead.”
Average temperatures are expected to return by the middle of next week.
Several demonstrators have been detained after rival groups faced off over a hotel accommodating asylum seekers in north London, with police breaking up brief clashes.
The Metropolitan Police has since imposed conditions on the protest and counter-protest outside the Thistle City Barbican Hotel in Islington.
The protest was organised by local residents under the banner “Thistle Barbican needs to go – locals say no”.
The group of several hundred people waved union flags and banners, and one man chanted: “Get these scum off our streets.”
Image: Anti-immigration protesters waved Union Jack flags. Pic: PA
A larger group staged a counter demonstration to voice support for asylum seekers, bearing a banner that read: “Refugees are welcome.”
People inside the hotel, believed to be migrants, watched on, with some waving and blowing kisses from the windows.
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Image: People believed to be asylum seekers waved the hotel windows. Pic: PA
Image: Pro-immigration protesters gathered by the Thistle City Barbican Hotel. Pic: PA
A man wearing an England football shirt was detained by police after getting into an altercation with officers.
There have been nine arrests so far, seven of which were for breaching conditions police put on the protests under the Public Order Act.
Rival groups separated by police
Another protest was scheduled in Newcastle on Saturday, outside The New Bridge Hotel, as anti-migrant sentiment ripples through some communities around the country, also flaring up recently in Epping.
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Last week: Protesters divided over migrant hotels
The counter-protest in London was organised by local branches of Stand Up To Racism, and supported by former Labour leader and Islington North MP Jeremy Corbyn.
Other community groups including Finsbury Park Mosque and Islington Labour Party were also involved.
Groups online that backed the original protest include “Patriots of Britain” and “Together for the Children”.
At one point, a large group of masked protesters dressed in black, calling themselves anti-fascists, appeared from a side street and marched towards the rival group outside the hotel.
The two groups briefly clashed before police rushed in to separate them.
Image: Pic: PA
Image: Supporters of local protest group ‘Thistle Barbican needs to go – locals say no’. Pic: PA
Why are asylum hotels used?
The government is legally required to provide accommodation and subsistence to destitute asylum seekers while their claims are being decided, most of whom are prohibited from working.
A jump in the use of hotels since 2020 has been attributed to the impacts of the COVID pandemic, a backlog in unresolved asylum cases, and an increase in the number of migrants crossing the Channel in small boats.
However, the number of asylum seekers living in hotels has fallen recently, from 38,079 at the end of 2024 to 32,345 at the end of March 2025, according to the Refugee Council.
How police tried to keep groups apart
The police imposed conditions on both groups in London to prevent “serious disorder” and minimise disruption to the community.
Those in the anti-asylum hotel protest were told to remain within King Charles Square, and to gather not before 1pm and wrap up by 4pm.
Those in the counter-protest were to required to stay in an area in Lever Street, and assemble only between 12pm and 4pm, but were still in eye and ear shot of the other group.
Chief Superintendent Clair Haynes, in charge of the policing operation, said: “We have been in discussions with the organisers of both protests in recent days, building on the ongoing engagement between local officers, community groups and partners.
“We understand that there are strongly held views on all sides.
“Our officers will police without fear or favour, ensuring those exercising their right to protest can do so safely, but intervening at the first sign of actions that cross the line into criminality.”
Meanwhile, the protest in Newcastle was promoted by online posts saying it was “for our children, for our future”.
The “stop the far right and fascists in Newcastle” counter-protest was organised by Stand Up To Racism at the nearby Laing Art Gallery.
A man has been remanded into custody charged with child cruelty offences after allegedly lacing sweets with sedatives.
Jon Ruben, 76, of Ruddington, Nottinghamshire, appeared at Leicester Magistrates’ Court on Saturday after youngsters fell ill at a summer camp in Stathern, Leicestershire.
He has been charged with three counts of wilfully assaulting, ill-treating, neglecting, abandoning or exposing children in a manner likely to cause them unnecessary suffering or injury to health.
The charges relate to three boys at the camp between 25-29 July.
Image: The scene in Stathern, Leicestershire. Pic: PA
Ruben spoke only to confirm his name, age and address.
Police received a report of children feeling unwell at a camp being held at Stathern Lodge, near Melton in Leicestershire, last Sunday.
Officers said paramedics attended the scene and eight boys – aged between eight and 11 – were taken to hospital as a precaution, as was an adult. They have since been discharged.
Police said the “owners and operators of Stathern Lodge are independent from those people who use or hire the lodge and are not connected to the incident”.
Leicestershire Police has referred itself to the Independent Office for Police Conduct, after officers initially reported the incident as having happened on Monday, only to later amend it to Sunday.
It is still unclear when officers responded and whether that is why the watchdog referral has been made.
Ruben will next appear at Leicester Crown Court on 29 August.
Addressing the City Academy Voices choir directly, the bishop of Fulham said: “I write to apologise for the distress and offence I caused in bringing the concert to a premature end.
“This should not have happened … I also apologise for remarks which were made in haste, and which have understandably caused hurt and distress.”
Image: The bishop, in his dressing gown, gave the choir a dressing down
Mr Baker had demanded for the performance to stop because it was 10pm – and says he didn’t realise the choir had booked the church until 11pm.
In the statement obtained by Sky News, he added: “I have lived here on site at St Andrew’s for 10 years, for much of which City Academy has rehearsed and performed here.
“You have been, and continue to be, welcome – and I hope that you will be able to continue the relationship with us.
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“I can give you every assurance that the events of Friday evening will not recur, and I apologise again to performers (especially those unable to perform at the end of the evening) and the audience alike.”
Image: The choir performed their last song
The choir was performing to a 300-strong audience in Holborn when the lights were suddenly turned off, with Mr Baker declaring the concert was “over”.
A church employee then asked the crowd to leave quietly and for the musicians to step down from the stage, attracting boos from the audience.
The choir went on to perform one last song, an A cappella version of ABBA’s Dancing Queen, before bringing their show to a close.
One member of the audience, who was attending with his 10-year-old daughter, told Sky News he initially thought the interruption was a staged joke.
Benedict Collins had told Sky News: “This work deserves respect, not to be disparaged as a ‘terrible racket’. The people here had put their heart and soul into it.
“The bishop cut them off in midstream, preventing soloists who had worked their hardest from singing – and preventing the audience, which included people of all ages, from enjoying it to the end.”
The choir told Sky News it was “upsetting” that they were unable to finish their show as planned, but “hold no hard feelings and wish the bishop well”.
A spokesperson added: “If anyone is thinking of joining one of our choirs, the City Academy Voices rehearse on Mondays in central London. Dressing gowns optional.”