Heatwaves increase health risks for kidney and dialysis patients

Medical experts are warning that rising summer temperatures and high humidity pose significant risks to individuals with chronic kidney disease and those undergoing dialysis. Excessive sweating and fluid loss can reduce blood flow to the kidneys, potentially leading to rapid changes in creatinine and electrolyte levels, such as sodium and potassium.

Dialysis patients face a unique paradox: while health authorities recommend high fluid intake during heatwaves, many dialysis patients must adhere to strict fluid restrictions—often limited to 500–750 ml per day—to prevent fluid overload between sessions.

Additionally, certain medications can exacerbate heat-related risks. Diuretics may increase dehydration and impair kidney function, while some antidepressants, antipsychotics, and beta-blockers can interfere with the body’s ability to regulate temperature or respond to heat stress. Certain antibiotics and antifungals may also increase skin sensitivity to UV rays.