Dehydration is an issue for both transplant patients to keep their new transplant healthy and for dialysis patients who already watching their fluid intake.
If in any doubt about how much you should be drinking please consult your clinical team, especially fluid restricted dialysis patients.
Keep cooler by:
Dr Popoola provided the following links to provide you with general information:
https://www.nhs.uk/live-well/healthy-body/heatwave-how-to-cope-in-hot-weather/
And advanced warning of the weather at:
https://www.metoffice.gov.uk/public/weather/heat-health/#?tab=heatHealth
Remember, children and the elderly are particularly vulnerable so help them and keep an eye out for signs of heat-stroke.