People in Lichfield and Burntwood are being warned to stay safe during the warm spell of weather.
Staffordshire County Council is urging residents not to cool off in open water as temperatures soar.
The warning comes after recent deaths in Stowe Pool and Chasewater.
Cllr Gill Heath said: “The death of Carl Storer in Chasewater was both a tragic and timely reminder of how people can quickly get into difficulties.
“With schools breaking up for the summer and warmer weather on the way we are calling for parents to remind their children of the dangers, and are warning people not to be tempted to cool off in open water.
“Swimming in open water is completely different to swimming in a safe, controlled swimming pool and can be very dangerous.
“People wanting to take up open water swimming should only do so with organised groups and experienced instructors.
“We want people to have a safe and enjoyable time this summer and would certainly encourage people to swim in one of the many public pools across Staffordshire.”