Staffordshire residents are being urged to take extra care as an amber heat health alert remains in place across the county until 9pm on Sunday 12 July.
The warning is particularly aimed at older people, babies and young children, and anyone with underlying health conditions, who face greater risks during extended periods of hot weather.
How to stay safe in the heat
The county council advises people to drink plenty of fluids, stay in the shade where possible, wear sunscreen and appropriate clothing, and regularly check on vulnerable friends, neighbours and relatives.
Open water dangers
Staffordshire County Council is renewing warnings about the risks of swimming in open water during hot weather. While lakes and reservoirs may seem appealing on the hottest days, they present serious dangers.
Water temperatures are often much colder than expected. Entering the water suddenly can trigger cold water shock, which causes breathing difficulties and panic that can quickly become life-threatening. Hidden hazards below the surface and sudden changes in depth that may not be visible add to the risk.
Fire safety reminder
The council is also warning of the heightened risk of fires caused by disposable barbecues and open flames in parks and countryside locations during hot weather.
Hayley Coles, Deputy Leader and Cabinet Member for Communities and Culture at Staffordshire County Council, said: "While many of us look forward to the warmer weather, it can present real risks for other more vulnerable members of our communities which is why we're reminding people to take extra care."
She added: "When the weather is warm, it's also natural for people to want to cool down, but open water can present serious risks, even on the hottest days."