The Indian Meteorological Department (IMD) suggests this year’s summer will be hotter than usual. As the temperature rises, it can pose a serious threat to kidney health. On the World Kidney Day let us understand how the rise in temperature can affect our kidneys and the different ways to stay safe and healthy.
Amongst the serious diseases, kidney disease is globally recognised as a major threat. According to the International Society of Nephrology, a 2023 study states that more than 788 million people were living with chronic kidney disease, and 138 million of those adults are from India. When it comes to summer, most attention goes to heatstroke and dehydration, kidney health is often ignored, yet it is the organ under stress when temperatures rise.
How are heatwaves and kidney health related?
The kidney is an important organ that plays a crucial role in maintaining body balance. From filtering waste to regulating fluid and controlling blood pressure, the kidney manages everything.
When the temperature rises, our body diverts blood toward the skin to cool down, which reduces the blood reaching the kidneys. This condition is called as renal hypoperfusion, where very few nutrients and even less oxygen reach the kidneys. So, when dehydration occurs, the kidneys face the maximum burden. Kidneys work even harder to filter waste, which can damage kidney tissue. A recent study published in the Environmental Science Advances and Environmental Geochemistry and Health discusses chronic kidney disease of unknown origin. This condition is mostly seen among field workers exposed to heat who are not properly hydrated.
Who is vulnerable to kidney stress?
1. Older people above 70 are at risk, as their body has lost the ability to understand thirst properly.
2. People spending more time in direct sunlight.
3. Those who already have health conditions like diabetes, hypertension, or early-stage kidney disease
What are the early signs of kidney problems?
As per the Indian Council of Medical Research guidelines, these are the signs:
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If you don’t feel like urinating for 6–12 hours, even though you are drinking liquid
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If the urine colour is dark
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If feet or face swells
How to protect kidneys in summer?
1. Liquid intake the right way: The National Institute of Nutrition recommends maintaining consistent fluid intake.
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Drink sufficient plain water
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Buttermilk (chaas)
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Lemon water (nimbu paani)
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Oral Rehydration Salts (ORS)