With some hot weather expected over the next few days, people are being urged not to cool off by swimming unsupervised in open water.

Staffordshire County Council's Communities leader, Victoria Wilson explained that on a hot day, the water can look incredibly inviting but can also be extremely dangerous.

Even the strongest swimmers can find themselves at risk from the sudden change between air and water temperature and hidden hazards beneath the surface.

Victoria said: "It's great to have another spell of warmer weather but I want to remind people about the dangers of swimming in unsupervised waters.

"I do understand people wanting to cool off by going for a swim but plunging into open water is completely different to swimming in a safe, controlled pool.

"Unfortunately we hear far too often about people getting into difficulties swimming in reservoirs, lakes and quarries.

"Our message is very much enjoy being near the water and the supervised activities on offer when it comes to places such as Chasewater reservoir, but when it comes to swimming be safe and go to public, supervised pools."

No matter how warm the day, large bodies of water stay very cold, with temperatures around 2 degrees Celsius, and that can cause cold water shock, which can lead to a sudden loss of consciousness.

Swimmers in lakes and reservoirs are also at risk from becoming entangled in underwater weeds and dumped rubbish, or being caught out by unseen currents and other dangers.

For instance, at Chasewater where swimming is not allowed, the floor of the reservoir shelves deeply and suddenly in places, while there is an undertow towards the pipe network carrying water away.