By: Michael Moustakakis, MD, Group Medical Director for DaVita
Extreme heat waves trigger standard public health advice everywhere: Drink plenty of water. For the general public, it’s a vital strategy to stay healthy and avoid heatstroke. But for the approximately 550,000 Americans living with end stage kidney disease (ESKD) and managing life on dialysis, this advice can be dangerous.
Why It Matters: Summer heat can present a difficult challenge. Failing to navigate the balance of needing to avoid dehydration in extreme heat and following strict fluid restrictions can lead to preventable issues, including hospital admissions and emergency room visits.
The Risks: Dehydration vs. Fluid Overload
When the temperature soars, people with ESKD face a delicate balance of managing intense thirst and risk of dehydration with the risk of fluid overload. That’s because their kidneys can no longer properly filter and remove excess salt and fluid.
While hot weather causes fluid loss through sweating, drinking too much when you have kidney failure can lead to fluid accumulating where it doesn’t belong.
This could result in:
- Swelling
- Shortness of breath
- High blood pressure
- Severe strain on the heart
Conversely, ignoring the heat’s impact can lead to dehydration, bringing its own set of dangerous complications.
Proactive, Integrated Interventions
Waiting for a patient to report a problem may mean intervening too late. Patients should understand the warning signs of dehydration and heat illness. That’s why it’s critical that multidisciplinary care teams work together and operate proactively to manage individual and population health risks during extreme weather events, including intense summer heat. Every member of the care team plays a role in helping patients manage their fluid intake, including:
- Dietitians Drive Behavioral Strategy: Managing thirst requires targeted dietary management, not just fluid restriction. DaVita dietitians work with patients to optimize sodium intake and introduce fluid-friendly alternatives, proactively mitigating the physiological triggers of thirst before they lead to fluid overload.
- Nurses Monitor Leading Indicators: Frontline clinical teams closely track target weights, blood pressure trends and other symptoms. This high-frequency touchpoint model enables our nurses to catch early warning signs of fluid imbalance and empower interventions before acute care is required. Patients should monitor weight at home, limit outdoor activity, and make use of air conditioning and cooling stations when available.
- Nephrologists Provide Clinical Guardrails: During prolonged heatwaves, physicians leverage these insights to adjust individualized care plans during summer heat. Interdialytic weight gain — the amount of fluid weight gained between dialysis treatments — should remain less than 4% to 4.5%, but some medications may increase the risk of volume depletion or limit the patient’s ability to sense it.
The Bottom Line
Managing complex chronic diseases in the face of environmental extremes requires abandoning generic guidelines and siloed care. As healthcare providers, we must adopt continuous, integrated care models that wrap around the patient. By leveraging multidisciplinary teams — from nephrologists to dietitians — we don’t just react to the weather; we proactively safeguard our patients, ensuring they remain safe, comfortable and out of the hospital.