The coming decades promise a stunning expansion of America's “kidney stone disease," particularly in southerly states where the prevalence of dehydration — and thus kidney stones — is markedly higher. Today this disease covers roughly 40% of the U.S. population. Research suggests the number will be 56% by 2050, 70% by 2095. With more pollen in the air due to climate change, everyone is worried about allergies. But focus your attention where it really counts. Common sense suggests the best time to lock up a world-class urologist is now.