The deaths prompted the Royal National Lifeboat Institution (RNLI) to warn of the "very real risk" of swimming in open water during the heatwave - as Tuesday saw the hottest ever May day recorded in the UK, breaking the record for a second day in a row.
The body of a teenager was recovered from the water at Rother Valley Country Park in the early hours of Tuesday after he went missing, South Yorkshire Police said - marking the fourth death by drowning over the heatwave period.
A specialist search operation was launched following reports at 6.50pm on Monday that the boy had entered the water, but had not been seen getting out.
In County Dublin, Ireland, another teenager died while swimming in the sea over the weekend, officials confirmed on Tuesday.
Meanwhile, police in Lancashire said on Tuesday that searches were under way after a boy got into difficulty while swimming in a river in the Ribble Valley.
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Police were called at just after 2pm on Tuesday regarding the welfare of a child who had gone into the river at Ribchester.
The boy had gotten into difficulty while swimming with friends, police said.
On Sunday, a body was discovered in the search for a boy who got into trouble in a lake in Lincoln.
Emergency services were called to Swanholme Lakes at 2.30pm on Sunday after reports that 15-year-old Declan Sawyer had entered the water and was missing.
On Monday afternoon, a 13-year-old boy died after getting into difficulty at Leadbeater Dam, near Halifax, West Yorkshire.
A West Yorkshire Police spokesperson said the teenager was pulled from the water and taken to hospital, where he was pronounced dead.
That same afternoon, a man in his 60s died of cardiac arrest after entering the sea at Tregirls Beach, Padstow, to help two family members who had gotten into difficulty, Devon and Cornwall Police said.
The two family members were brought to safety by members of the public.
On Monday evening, the body of a teenage girl was recovered from the water at Kingsbury Water Park, Warwickshire.
The RNLI said on Tuesday that while temperatures reached record highs for May over the bank holiday weekend, water temperatures remained low, which could lead to cold water shock, a reaction that causes the blood vessels in the skin to close and increases heart rate.
The charity said in a statement: "While the air temperature is warm, the seas are still cold and cold water shock remains a very real risk.
"With many school children enjoying half term, the lifesaving charity is urging everyone to stay safe."
Amber heat-health alerts issued
The weather service said Heathrow had also provisionally recorded 35C.
In a post on X, the Met Office said: "Today is now the hottest day in May on record for both England and Wales with Kew Gardens provisionally reaching 35.1°C and Cardiff Bute Park reaching 32.9°C."
The UKHSA this morning renewed its amber heat-health alerts, first issued last week ahead of the scorching weather.
An amber alert covers: East Midlands, West Midlands, East of England, London, South East, and South West.
The North East, North West, and Yorkshire and The Humber are on a yellow alert, which means a greater risk to life for vulnerable people.
A yellow weather warning for thunderstorms also came into force this afternoon.
The Met Office warning covers a huge swathe of England and is in place from 3pm until 10pm.
The high temperatures over the Bank Holiday also saw a grass fire break out near Arthur's Seat in Edinburgh on Monday.
Two 15-year-old boys were given youth rehabilitation orders (YRO) and put on a supervision and surveillance programme by a judge last week.
They raped the girls in separate attacks in Fordingbridge, Hampshire, in November 2024 and January 2025. Footage was also shared on social media.
Prime Minister Sir Keir Starmer said it was "clearly the right outcome" as he confirmed the attorney general had decided to refer the case to the Court of Appeal under the unduly lenient sentence scheme.
A third boy, 14, was also given a YRO for encouraging one of the attackers - and for an indecent images offence - over the January attack.
His sentence will be reviewed too, although the referral does not automatically mean the sentences will be altered.
The Court of Appeal could leave them unchanged if it decides they were within a reasonable range of sentences available to the judge.
One of the victims told the BBC the sentences were "like a rock straight in my face" and politicians across the spectrum have raised serious concerns.
Conservative Party leader Kemi Badenoch called it a "disgrace", while Reform's Robert Jenrick said the judge had made a "very bad error".
In a statement today, Attorney General Richard Hermer KC called it a "horrific case" and said he wanted "to bring closure to the victims and their families".
"It is clear to me from their powerful personal statements, that these girls have displayed immense bravery in coming forward," he added.
The girl in the first incident, who was 15 at the time, attended sentencing to deliver a victim impact statement.
She said: "I was caught off-guard, I never want that to happen again, I will never get that innocence back again."
"No one deserves the trauma of being raped," she added.
In a statement on her behalf, the other girl described nightmares and struggling to sleep.
"I feel ashamed, insecure and uncomfortable in my own body," she said.
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Judge Nicholas Rowland praised their bravery in giving evidence, but said he wanted to "avoid criminalising these children unnecessarily".
He told the boys: "I have to remember that you are not small adults.
"I have to think how likely you are to do serious things again and I need to make sure you do not do serious things again in the future."
He also said "peer pressure" had played a large part in their actions.
The court was told one of the boys had ADHD and "long-standing anxiety", while the other also had an ADHD diagnosis and an IQ in the "bottom 1%".
The 14-year-old was described as having "mild cognitive impairment".
Alnour Mohamed Ali, 27, pleaded guilty to the charge of endangering others during a sea crossing after the deaths of two men and two women on 9 April.
The four drowned after being swept away as they tried to climb onto a dinghy at Equihen-Plage, near Boulogne-sur-Mer in France last month.
Speaking through an Arabic interpreter, Ali pleaded guilty to piloting a boat which "thereby created a risk of death or serious personal injury to others aboard the boat", knowing that he would arrive in the UK without valid entry clearance.
More than 40 people were rescued off the coast of northern France that morning.
Two children were among those taken to hospital as a precaution afterwards and another person was treated for hypothermia.
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Endangering others during a journey by sea to the UK is a new offence introduced as part of border security legislation earlier this year.
He is due to be sentenced on 10 June.
Afghan national Tajik Mohammad, 32, the first man convicted of the same offence, is also set to be sentenced that day.
Cameron Ross, 39, carried out his serious sexual assaults in Stornoway on the Isle of Lewis in 2012 and 2014. He then abused his third victim in Inverness between 2019 and 2022.
Ross denied any wrongdoing but was found guilty on Monday following a trial at the High Court in Edinburgh.
Judge Alison Stirling denied the abuser bail and remanded him in custody ahead of sentencing on 2 July.
Police Scotland said the force's professional standards department will begin an investigation into gross misconduct upon the conclusion of the criminal proceedings.
Chief Superintendent Helen Harrison said: "Ross' actions go against everything Police Scotland stands for.
"Our thoughts are with the victims in this case and I hope this conviction provides them with some measure of closure.
"I commend their strength in reporting these crimes and bringing this individual to justice."
During the trial, jurors heard how Ross raped the first woman after they met at a party between August and October 2012.
The woman told the court how Ross "pinned her down" on a bed before carrying out the attack, noting: "I didn't say anything. I froze."
She said the incident had left her traumatised.
A second woman told of how Ross sat on her and restrained her before raping her in June 2014.
He went on to subject a third woman to a course of abusive behaviour between October 2019 and June 2022.
In evidence, the court was told Ross repeatedly pushed and pulled her, seized her by the body and hair, threw her to the ground and twisted her arm behind her back.
He additionally brandished a knife at her.
Ross also shouted, swore and threatened to kill the victim, punched her on the face, sat on top of her and forced fingers into her mouth, gripped her throat and pressed down on the back of her neck, restricting her breathing.
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Ross was also convicted of behaving in a threatening and abusive manner on 5 June 2022 at an address in Inverness, where he shouted, swore and acted aggressively.
He later attempted to pervert the course of justice on that date by trying to speak to a woman who was providing a witness statement to an officer.
Ross was placed on the sex offenders' register ahead of his sentencing.
CS Harrison said: "We understand how difficult it can be to report these kinds of offences, particularly when the perpetrator is a police officer.
"We want the public to be reassured that all reports are thoroughly investigated, no matter when the offending took place or who is involved.
"All officers are bound by our standards of professional behaviour, which apply on and off duty.
"Any instance where an officer fails to uphold our standards will be investigated and appropriate action taken."
Warning: This article contains details you might find distressing
Janice Nix, 67, was found guilty on Tuesday of the manslaughter of Andrea Bernard by forcing her into the bath in Thornton Heath, south London, in 1978.
Andrea's death was treated as an accident until her older brother Desmond Bernard went to police in 2022 with a new account of what happened, Isleworth Crown Court heard.
Nix, from Clapham, was also convicted of cruelty to Mr Bernard between October 1975 and June 1978, when he was seven to nine years old.
Mr Bernard, 56, tearfully told the trial he initially described his sister's death as an accident because he wanted Nix to stop beating him with a belt. He said she also burned him with a cigarette, bit him and made him eat cat food.
He added that Nix, whom he described as physically "strong" with a "heavy-set build", regularly beat the siblings, even for not folding their clothes "to her standards".
'Skin falling off after scalding hot bath'
Jurors heard that on 6 June 1978, Nix was "furious", shouted at Andrea and beat her after she ignored instructions not to leave the house and to help clean instead.
Mr Bernard said he later heard the bath running. He added: "I could hear Janice shouting 'get in the bath' and I could hear Andrea saying 'the bath is too hot mummy'.
"I could hear Janice shouting 'get in the bath, get in the bath' and then I heard screaming and splashing.
"Then I heard the screaming stopped and I could hear Janice calling Andrea to 'wake up, wake up'."
Mr Bernard said when he entered the bathroom, he saw Nix cradling his sister, who was "limp" and wrapped in a towel. "I could see skin falling off her," he said.
Andrea died nearly six weeks after being taken to hospital with burns to 50% of her body, the court heard.
A burns expert said a child exposed to water hot enough to cause Andrea's injuries would instinctively try to get out by standing up, with the prosecution arguing that Nix must have forcibly held parts of her body underwater.
Nix, then called Janice Thomas, and in her late teenage years, had been in a relationship with the children's father, also named Desmond Bernard, and was in effect their stepmother, the court heard.
'Constant fear' of Nix's beatings
Mr Bernard told jurors Nix asked him to say it was an accident that happened in the garden and that she would never beat him again. He complied with the lie and lived in "constant fear" of Nix's beatings.
Speaking about why he decided to tell others about his sister's death, he said: "I couldn't carry on dealing with it, so that's what I did. To place the burden where it should go."
During the 1978 inquest, Nix initially claimed Andrea took a bath on her own and complained of itchy legs before fainting, but she admitted during her trial that this account was false, saying she was "in a panic" over having failed to supervise Andrea while she took a bath.
"I realised I had done something I shouldn't have done: I should have been with Andrea," Nix told jurors. "I was young and I was clearly not thinking. On hindsight now, I see my negligence as a teenager."
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Nix was arrested at Heathrow Airport on February 18, 2025, after arriving on a flight from Antigua, and was charged later that day. She had denied both the charges of manslaughter and cruelty to a child.
Aisling Hosein of the Crown Prosecution Service said Nix was only prosecuted because Mr Bernard reported Nix's actions to police in September 2022, resulting in the circumstances of what happened that day to be re-examined.
"I can only imagine the enormous courage this must have taken to come forward after being told as a child to say the incident was just an accident," Ms Hosein said.
"It is thanks to him that we have been able to secure justice today on behalf of Andrea almost five decades on."
Nix was remanded in custody to be sentenced at a later date.