A hot weather warning not to go into the water has been issued after the tragic death of a teenage boy.

A message has been issued after a 16-year-old died after a rescue attempt in Nottingham on just after 2pm on Wednesday.

One of a group of five boys got into trouble at Colwick Country Park - and despite the best efforts of up to 40 paramedics, police officers, and firefighters, he died.

People are being warned not to try to swim in open water such as lakes, ponds and quarries to cool off, report Nottinghamshire Live .

Inspector Craig Nolan, incident commander for Nottinghamshire Police, said one of the boys, who were thought to be Romanian, decided to swim out to a white buoy, "dived down under the water" but "did not come up again".

He had to be recovered by police divers and was rushed to Queen's Medical Centre but was pronounced dead just after 4pm.

A large number of police cars, ambulances and fire engines have raced to Colwick Park Marina

Inspector Nolan said: "We take this very seriously, a young male potentially drowned in the water and so we all responded wanting to save the young person's life and get them back to safety.

"We recovered a young male from the water. He was immediately taken to Queen's Medical Centre in a very critical condition and we have just recently established that he was unsuccessful in coming round and subsequently died.

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"This weather is fabulous and glorious and the lake looks lovely and flat but actually the dangers are under the water."

Richard Hodgson, operation manager at Nottinghamshire Fire and Rescue Service, explained what might have happened to the teenager who died.

A police underwater and specialist search unit is pictured beside the lake at Colwick Country Park.

He said: "When you go into cold water it has an impact on your body even if you are a strong swimmer.

"Even doing short distances sucks the energy out of you and you don't make it. Our message is water safety - for people to think about the dangers."

Emergency services pictured near Colwick Park Marina.

A Nottingham City Council spokesman said: "We are very sorry to hear about this tragic incident Colwick Park Lake, and our thoughts are with the boy’s family and friends.

"We can’t emphasise strongly enough that any open water like lakes, rivers and canals can be very dangerous, however tempting it may be in the current hot weather."