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.
An MP has told Sky News she was attacked online by the Tate brothers after she participated in a debate in the House of Commons about violence against women.
The controversial duo, Andrew and Tristan Tate, are facing charges of rape and human trafficking in the UK – all of which they deny.
But they are still very active online, and according to Sorcha Eastwood, the MP for Lagan Valley, are targeting her.
In a document seen by Sky News, Tristan Tate has highlighted one of the MP’s tweets and writes in private correspondence: “MP, nice target, can we sue her?”
Sorcha Eastwood says at first she thought the replies were from parody accounts and not the Tate brothers.
Her original tweet was about Elon Musk, not the Tate brothers. The MP said Musk’s tweets should be looked at through a counter-extremism lens.
“I was really concerned, I was concerned because to me that is a direct attack for want of a better phrase on me serving my constituents.
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“I couldn’t believe that they decided to pick this random Northern Irish MP. The fact that it wasn’t even about them. This is something I didn’t go looking for.
“I think from my perspective, it’s a very, very sinister attempt to shut down important voices in public life, political discourse.”
It was only when she started noticing an uptick in abuse from other accounts she realised she had encountered some of the brothers’ followers.
“I had rape threats. I had death threats. I had people saying I should be hung from a lamppost. I had people saying I should be chopped into liver. I also had people then who were like we’ll waste 15 minutes raping Sorcha Eastwood.”
Image: A representative for the Tate brothers told Sky News that there was no targeted campaign against Sorcha Eastwood
A representative for the Tate brothers told Sky News that there was no targeted campaign against her.
They said: “Ms Eastwood has a distorted view regarding social media if she believes one is required to ‘invite or ask’ people to interact.
“Tristan Tate is entitled to his view in relation to her tweet regarding Elon Musk.”
The self-styled “misogynist influencer” Andrew Tate and his brother Tristan have both been charged with human trafficking, face allegations of trafficking minors, sexual intercourse with a minor and money laundering in Romania.
There is also a European arrest warrant for them as they are facing separate, unrelated charges of rape and human trafficking in the UK. They deny all charges.
Ms Eastwood now worries for others who don’t have a platform like her and who may not feel like they can speak out.
“If this is what has happened to me I have absolutely no doubt that this has happened to others where they have been attempted to be silenced.”
Keir Starmer has previously commented on the Tate brothers’ case in the Commons saying it is “a live issue”, but adding that “the principle is absolutely clear” in relation to whether the brothers should face justice.
Sorcha Eastwood says she wants to see the government do much more to protect against abuse online.
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Tate brothers deny wrongdoing
“I think ultimately the government has taken the wrong course on this. They need to step up.
“This should be an issue of national security as far as the radicalisation of young people online. It should be an issue in terms of the levels of misinformation, disinformation and the lack of trust that is had in our politics right across the UK and Europe.
“I want the government to help me, help every other person to crack down on this and get serious about it. And the only way they’ll be able to do that, is by hitting these tech companies in the only language which they understand, which is money and via robust legislation.”
A government spokesperson said: “Violence against women and girls is a scourge on our society which is why we have set out an unprecedented mission to halve these crimes within a decade.
“Tackling illegal abuse both online and offline is central to supporting victims and preventing harm in our communities and we will not hesitate to strengthen laws to deliver this mission.
“Last month, parts of the Online Safety Act came into force meaning companies must take action to protect users from illegal material including extreme sexual violence.
“Further protections from this summer will require platforms to protect children from harmful, misogynistic, and violent content.”
In parts of Birmingham, the stench is overwhelming – enough to make you heave.
At a block of flats in Highgate, in Birmingham city centre, we find a mountain of bin liners full of rubbish spewing out of the cavernous bin store, which is normally locked.
Mickel comes out to speak to us, while all around bin liners lie open, with the contents for all to see, including used nappies and rotting food.
Image: Mickel says they’ve had ‘foxes and rats, literally the size of cats’
Image: Outside Mickel’s flat in Highgate, bin liners lie open, spewing out rubbish
We both find it hard to keep talking amid the awful smell.
“We’ve had foxes and rats, literally the size of cats, flies, it’s just nasty, something needs to be done,” he says.
Image: Chris says the situation is ‘overwhelming’ as she’s ‘terrified of rats’
Around the corner, I meet Chris, in her dressing gown, popping the bins into her bin store beneath her flat before work.
She unlocks it, and although it isn’t bursting out on to the street yet, it is getting full.
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She says the situation is “overwhelming” as she’s “terrified of rats”. But, even so, she has sympathy for the striking bin workers.
“It’s not an easy job; they must have a heart of gold to do that job,” she says.
“Pay them whatever they need, they deserve it.”
Image: Striking bin workers at Lifford Lane tip, south of the city centre
Image: There’s an awful smell coming from a mountain of bin liners outside Mickel’s flat in Highgate
At Lifford Lane tip, south of the city centre, Brigette has pulled up alongside picketing workers. The back seat of her car is full of rubbish.
She apologises for the terrible waft, mixed with air freshener.
“It’s very pungent, isn’t it? Not nice,” she admits.
“It’s unfortunate, I have some sympathies for all the parties, but, equally, we have a duty of care to stay clean and tidy.”
She says she has her rubbish and that of her elderly aunt and plans to make weekly trips to the tip until a resolution in this pay dispute between the council and the Unite union is found.
The US is “our closest ally” but “nothing is off the table” in response to Donald Trump’s 10% tariffs on imports from the UK, the business secretary has said.
In a statement following the US president’s nearly hour-long address to the world, Business and Trade Secretary Jonathan Reynolds said: “We will always act in the best interests of UK businesses and consumers.
“That’s why, throughout the last few weeks, the government has been fully focused on negotiating an economic deal with the United States that strengthens our existing fair and balanced trading relationship.”
Mr Reynolds reiterated the statements from the prime minister and his cabinet over the past few days, saying the US is “our closest ally”, and the government’s approach is to “remain calm and committed to doing this deal, which we hope will mitigate the impact of what has been announced today”.
Image: Business Secretary Jonathan Reynolds says “nothing is off the table” following the tariffs announcement. Pic: PA
But he continued: “We have a range of tools at our disposal, and we will not hesitate to act. We will continue to engage with UK businesses, including on their assessment of the impact of any further steps we take.
“Nobody wants a trade war, and our intention remains to secure a deal. But nothing is off the table, and the government will do everything necessary to defend the UK’s national interest.”
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‘Get back round the negotiating table’, say Tories
The Conservative Party’s shadow business and trade secretary described the US president’s announcement as “disappointing news which will worry working families across the country”.
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Sky’s Ed Conway examines how economies across the world are impacted by tariffs
Andrew Griffith hit out at the government for having “failed to negotiate with President Trump’s team for too many months after the election, failed to keep our experienced top trade negotiator, and failed to get a deal to avoid the imposition of these tariffs by our closest trading partner”.
“The chancellor’s emergency budget of just a week ago with its inadequate headroom is now at risk, casting uncertainty about more taxes or spending cuts,” he continued. “Sadly, it is British businesses and workers who will pay the price for Labour’s failure.”
He called on ministers to “swallow their pride” and “get back round the negotiating table to agree a fair deal to protect jobs and consumers in both the UK and the US alike”.
Relief in Westminster – but concessions to Trump to come
It has been quite a rollercoaster for the government, where they went from the hope that they could avoid tariffs, that they could get that economic deal, to the realisation that was not going to happen, and then the anticipation of how hard would the UK be hit.
In Westminster tonight, there is actual relief because the UK is going to have a 10% baseline tariff – but that is the least onerous of all the tariffs we saw President Trump announce.
He held up a chart of the worst offenders, and the UK was well at the bottom of that list.
No 10 sources were telling me as President Trump was in the Rose Garden that while no tariffs are good, and it’s not what they want, the fact the UK has tariffs that are lower than others vindicates their approach.
They say it’s important because the difference between a 20% tariff and a 10% tariff is thousands of jobs.
Where to next? No 10 says it will “keep negotiating, keep cool and calm”, and reiterated Sir Keir Starmer’s desire to “negotiate a sustainable trade deal”.
“Of course want to get tariffs lowered. Tomorrow we will continue with that work,” a source added.
Another source said the 10% tariff shows that “the UK is in the friendlies club, as much as that is worth anything”.
Overnight, people will be number-crunching, trying to work out what it means for the UK. There is a 25% tariff on cars which could hit billions in UK exports, in addition to the blanket 10% tariff.
But despite this being lower than many other countries, GDP will take a hit, with forecasts being downgraded probably as we speak.
I think the government’s approach will be to not retaliate and try to speed up that economic deal in the hope that they can lower the tariffs even further.
There will be concessions. For example, the UK could lower the Digital Services Tax, which is imposed on the UK profits of tech giants. Will they loosen regulation on social media companies or agricultural products?
But for now, there is relief the UK has not been hit as hard as many others.
Liberal Democrat leader Sir Ed Davey has reacted furiously to Mr Trump’s announcement of a “destructive trade war”, and called on the government to stand up against “Trump’s attempts to divide and rule”.
“The prime minister should bring our Commonwealth and European partners together in a coalition of the willing against Trump’s tariffs, using retaliatory tariffs where necessary and signing new trade deals with each other where possible.”
Speaking on Wednesday evening at a White House event entitled ‘Make America Wealthy Again’, the US president unleashed sweeping tariffs across the globe.
Mr Trump held up a chart detailing the worst offenders – which also showed the new tariffs the US would be imposing.
The UK’s rate of 10% was perhaps a shot across the bow over the 20% VAT rate, though the president’s suggested a 10% tariff imbalance between the two nations. Nonetheless, tariffs of 10% could directly reduce UK GDP by between 0.01% and 0.06%, according to Capital Economics.
A 25% duty on all car imports from around the world is also being imposed from midnight in the US – 5am on Thursday, UK time.
The UK government had been hoping to negotiate an economic deal with the US in a bid to avoid the tariffs, but to no avail. The government says negotiations will continue.
The Confederation of British Industry said “negotiating stronger trading relationships with all like-minded partners will be foundational to any success”.
The business secretary is expected to make a statement in the House of Commons on Thursday, and we are also expecting to hear from the prime minister.