Mackenzie’s death comes after a number of other water-related fatalities in recent weeks, including three others in Yorkshire.
On Sunday, a 13-year-old girl died on Sunday after going missing in a river in North Yorkshire.
The teenager was found in the River Wharfe, near Burnsall, in the Yorkshire Dales, and later died in hospital.
A 15-year-old girl from Cheshire died in hospital on Saturday after getting into difficulties in the sea off the coast of Merseyside on Bank Holiday Monday.
A woman in her 60s also died on Saturday after she and a man got into difficulty after entering the water in Thornton Cleveleys to “rescue their dog”.
Lancashire Police said the man, also in his 60s, remains in a critical condition in hospital.
On 26 May, the body of a teenager was recovered from the water at Rother Valley Country Park, Rotherham.
A day earlier, a 13-year-old boy died after getting into difficulty at Leadbeater Dam, near Halifax, West Yorkshire.
