Rescue services have issued a stark warning about the dangers of 'tombstoning', when thrillseekers jump from heights into water.
The RNLI has posted a video on YouTube in the hope of reducing the number of deaths and injuries, as the hot weather makes a cold plunge ever more tempting.
John Andrews reports:
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The youngsters - known as kits - are living with their parents at the Woodland Valley Farm in Ladstock near Truro.
Some sunny spells as we go into this evening, with some low cloud coming in from the coast.
Ending the day with some pleasant sunny spells, however coastal low cloud will spread inland later, with some mist and low cloud.