As the Chicago summer heats up and temperatures climb into the 90s, people living with chronic kidney disease (CKD) means staying healthy during extreme heat requires more than simply drinking water. If you are living with CKD or are on dialysis, you know that managing your health is never quite that simple.
During periods of extreme heat, staying safe requires a careful balance. Staying hydrated is absolutely important, and you should drink water if you’re thirsty. However, managing your sodium intake is just as critical to keeping your body in balance when the weather gets extreme.
Here is what you need to know to stay cool, comfortable, and healthy this summer.
The Hidden Link Between Salt and Summer Heat
When it’s hot outside, your body naturally wants more fluids. This is where sodium comes into play. High-sodium foods artificially increase your thirst, making it much harder to stick to your prescribed fluid limits. By strictly limiting your salt intake, you can naturally minimize that intense thirst, reduce fluid retention, and maintain a much better fluid balance.
To keep your sodium in check during heatwaves:
- Skip the processed foods: Avoid salty snacks, canned soups, and fast food.
- Be mindful of restaurant meals: Heavy sodium is often hidden in restaurant dishes.
- Choose fresh: Opt for fresh fruits and vegetables that are naturally low in sodium.
Practical Ways to Stay Cool
Every kidney patient has a unique fluid recommendation based on their specific medical condition and treatment plan. You should always continue following the exact guidance provided by your care team and renal dietitian.
If you are feeling the heat, try cooling your body from the outside:
- Target your pulse points: Place cool, damp towels on your wrists, neck, or forehead.
- Take cool showers: A quick, cool shower can rapidly bring your core temperature down.
- Dress for the weather: Wear lightweight, loose-fitting, and light-colored clothing.
- Time your outings: Avoid outdoor activities during the hottest parts of the day (usually between 10 a.m. and 4 p.m.) and seek air-conditioned environments whenever possible.
Red Flags to Watch For
When the weather is extreme, it is vital to listen to your body and monitor it closely.
If you have a history of fluid retention, I highly recommend weighing yourself every single morning.
Keep a close eye out for swelling in your hands, feet, or ankles. Contact your healthcare provider immediately if you experience:
- Sudden, unexpected weight gain
- Increasing shortness of breath
- Signs of fluid overload
Conversely, you must also watch for signs of dehydration. If you experience dizziness, excessive fatigue, or notice dark-colored urine, reach out to your doctor.
We Are Here to Help
Every single kidney patient has a different journey and a different treatment plan. What works for someone else might not be safe for you. The absolute safest approach during a Chicago heatwave is to follow the precise recommendations of your healthcare team.
Please don’t make sudden adjustments to your diet or fluid intake on your own. If you have questions about how to handle the rising temperatures, your medication schedules, or your fluid limits, reach out to us at Associates In Nephrology. Small, careful adjustments can make a massive difference in keeping you safe and healthy all summer long.
Stay cool and stay safe!
Photo by Immo Wegmann on Unsplash

