Kidney Stone Season Is Coming: What Miami Residents Need to Know

Published: April 2026 • Written by David Robbins, MD, Board-Certified Urologist, North Miami, FL

If you live in Miami, you already know that summer heat arrives early and stays late. What you may not know is that South Florida sits squarely in what urologists call the "kidney stone belt"—a region of the southern United States where kidney stone rates are significantly higher than the national average, driven in large part by heat, humidity, and chronic dehydration.

Every year, kidney stone cases surge during the late spring and summer months. As temperatures climb, we lose more fluid through sweat, our urine becomes more concentrated, and the conditions for stone formation become ideal. Here is what you need to know to protect yourself this season.

Why Heat Causes Kidney Stones

Kidney stones are hard deposits of minerals and salts that form inside the kidneys when urine becomes too concentrated. The most common type—calcium oxalate stones—forms when calcium and oxalate bind together in concentrated urine. The equation is simple: less water intake + more sweating = more concentrated urine = higher risk of stone formation.

In Miami, where outdoor temperatures regularly exceed 90 degrees from May through October, many people are chronically mildly dehydrated without realizing it. Even mild dehydration sustained over weeks can lead to stone formation.

Who Is at Higher Risk?

• Outdoor workers — construction, landscaping, delivery, and anyone spending extended hours in the heat
• Athletes and fitness enthusiasts — particularly those who exercise outdoors or in hot studios
• Anyone with a prior history of kidney stones — once you have had one stone, your risk of recurrence is significantly higher
• Individuals with high-sodium or high-protein diets
• Men — who develop kidney stones at roughly twice the rate of women

How to Prevent Kidney Stones This Summer

1. Drink enough water to keep your urine light yellow or clear. The National Kidney Foundation recommends 8–12 cups of fluid per day. In Miami's heat, you will likely need more—especially if you are active outdoors.
2. Do not wait until you are thirsty. By the time you feel thirst, you are already dehydrated. Carry a water bottle and sip throughout the day.
3. Add lemon to your water. Lemons are high in citrate, which helps prevent calcium stones from forming.
4. Limit sodium. High-sodium diets increase calcium excretion in the urine, raising stone risk.
5. Do not cut calcium from your diet. Contrary to popular belief, adequate dietary calcium actually helps prevent calcium oxalate stones by binding oxalate in the gut before it reaches the kidneys. Eat 4–5 servings of dairy daily.
6. Moderate animal protein. Excessive protein intake increases uric acid levels and lowers citrate—both of which promote stone formation.
7. Limit sugary drinks and sodas. High-fructose beverages are associated with increased stone risk.

When to See a Urologist

If you experience any of the following, seek medical attention promptly:

• Severe pain in the back, side, or lower abdomen
• Blood in the urine
• Nausea and vomiting associated with flank pain
• Fever or chills with urinary symptoms (may indicate infection)
• Difficulty urinating

At Urological Consultants of Florida, Dr. Robbins offers comprehensive kidney stone diagnosis and treatment, including minimally invasive procedures such as ureteroscopy with laser lithotripsy and stent placement. We also provide personalized dietary counseling to help prevent recurrence.

Call (305) 575-2771 to schedule an appointment.