If you are an adult and have a fever of 105 degrees Fahrenheit (40.5 degrees Celsius) or higher, call your provider straight away, unless it goes away quickly with treatment and you are comfortable. Have a fever that persists at or rises over 103 degrees Fahrenheit (39.4degC). These symptoms may be a sign of a more serious condition called heatstroke. Heatstroke occurs when your body is unable to cool itself down properly. The only way to treat this condition is by reducing the patient's body temperature until it returns to normal. Heatstroke can be fatal if not treated promptly! Do not try to reduce a child's temperature using cold baths or ice packs, as this could cause them serious injury or even death. Parents should take measures to prevent their children from getting heatstroke, such as ensuring they drink enough water and wear appropriate clothing when outside in the sun. Children who are very young or who are already sickly may be more at risk from high temperatures. Adults too can suffer from heatstroke, so anyone who feels unwell during exercise should stop what they are doing and seek medical help.