Health chiefs are urging people to take extra care during South Yorkshire's heatwave - with temperatures today set to reach 32C.
They are expecting the rise in temperature to trigger an increase in calls for problems including breathing difficulties, fainting and unconsciousness.
Dr David Macklin, Executive Director of Operations at Yorkshire Ambulance Service, said: “As the temperatures soar over the next few days, we want to make sure the people of Yorkshire enjoy the heatwave safely. I would like to ask members of the public to be mindful of the following advice.
"Remember, some people are more at risk from the heat than others - for example, older people, babies and young children, and people with any pre-existing medical problems that can affect their breathing.
"Try to keep as cool as possible - wear a hat when sitting or working outside and use plenty of sun cream.
"If possible, avoid going out in the hottest part of the day,between 11am and 3pm, and if you have to go out, try to stay in the shade.
"Drink plenty of water and avoid drinking alcohol in the sun."
He added: “We know that this advice is common sense but, by reminding everyone, we hope it will help reduce the number of people who suffer any ill-effects from the hot weather.
“We will always respond to anyone needing time-critical medical assistance, but we ask that people think carefully before dialling 999 and only call for an ambulance in an emergency when it is obvious that you or another person has a serious or life-threatening illness or injury. People suffering from minor illnesses and injuries should consider more appropriate services for their needs such as visiting their local pharmacist or GP, attending a walk-in-centre or minor injuries unit or calling NHS 111.
“As always, our message regarding open water is to stay out and stay safe. It may be very appealing to jump into the water to cool off on a warm summer’s day but people need to be aware of how dangerous it really is.
"Water can look calm on the surface but contain unseen debris and, rivers in particular, can have treacherous undercurrents. In addition, the temperature of deep water is much colder than people would expect it to be and, even on a hot summer’s day, rarely gets above freezing.
“Every year lives are tragically lost across the UK and we don’t want to see anyone hurt or injured so the message is simple; enjoy the summer, stay out of open water and stay safe.”