People have been urged to take precautions near water after at least eight people, mostly children, drowned over the bank holiday weekend while trying to stay cool during the heat wave.
The Royal Life Saving Society (RLSS) issued a warning following the deaths, saying "warmer weather unfortunately sees an increase in accidental drownings".
It warned despite water temperatures remain very cold despite increased air temperatures, and that cold water shock could make swimming difficult and make it harder to get out of the water.
In all during the hotter weather, at least six young people have died in the water, as well as a man in his 60s and a woman in her 70s.
They include a 16-year-old girl who was recovered from Kingsbury Water Park in Warwickshire, a 12-year-old boy who went missing after swimming in the River Ribble in Ribchester.
In Cheshire, police have found a body in Pickmere Lake during the search for a 17-year-old boy who went missing after swimming at the beauty spot.
Wednesday brings a reprieve from the record-breaking temperatures, as cooler air moves over northern and eastern areas of England.
A leading network for drowning prevention has recommended swimming in supervised locations with lifeguards where possible and entering the water slowly to reduce the risk of cold-water shock.
Speaking to BBC Breakfast on Wednesday morning, Jim Bridge from Water Safety Partnership urged those who find themselves in difficulty in the water to "float to live".
"So lie on your back with you head back, with your ears submerged, use your arms and legs to stabilise yourself and just let your breathing come back to a normal breathing pattern.
"And when you're feeling confident that you've gotten used to the water and your breathing's normal, you can shout for help or swim to save yourself."
