A teenager has died after going into the sea in Skegness, Lincolnshire.
Police described him as “a boy under the age of 16”, saying he was in the water around 6.15pm on Saturday.
Officers and coastguards have carried out a search, with the boy’s body found around 11.30pm.
No further details have been released about the boy or how he got into trouble in the water.
Superintendent Lee Pache said: “Yesterday we received a high volume of calls from missing people on the coast.
“At one point, in two hours, we received 10 calls.
“Everyone who was reported missing, apart from the boy who sadly died, was located safe and secure.
“Our thoughts are with the boy’s family.”
UK weather live: Temperature hits 35C; man dies in Lake Doncaster; storm warnings have been extended
It came as temperatures pushed into the mid-30s in parts of the UK, prompting many to head to coastal areas to cool off.
Late last week, Gareth Morrison, head of water safety at the Royal National Lifeboat Institution (RNLI), said: “With so many people enjoying the water this summer, it’s important that we all know the risks.
“If you’re having trouble in the water, Float to Live: Lean back, using your arms and legs to stay afloat.
“Control your breathing, then call for help or swim to safety.
“In a coastal emergency, call 999 or 112 for the Coastguard.”
He added: “Record numbers are also taking to the water in watercraft such as stand-up paddleboards and kayaks, many for the first time. It’s important to always remember to wear a life jacket or buoyancy aid and use a means of ask for help”.