Josie Taylor | March 10, 2022
Climate change is expected to increase the number of people requiring hospitalization due to critically low sodium levels in the blood, a condition known as hyponatremia. A new study from Karolinska Institutet in Sweden predicts that a temperature rise of 2 degrees Celsius would increase the burden on hospitals from hyponatremia by almost 14 percent. The findings are published in the Journal of Clinical Endocrinology and Metabolism.
Climate change is expected to trigger a rise in average global temperatures in the coming decades, resulting in a myriad of heat-related consequences for human health. One of those is hyponatremia, which can occur from a variety of diseases such as heart, renal and liver failure as well as from excessive sweating or fluid intake that dilute the sodium concentration in the blood.
Our bodies need sodium to maintain normal blood pressure, support the function of nerves and muscles and regulate the fluid balance in and around our cells. If blood sodium levels drop, it can lead to nausea, dizziness, muscle cramps, seizures and even coma.
It is well known among doctors and scientists that hyponatremia cases increase in the summer months. Still, data on temperature thresholds above which risks amplify have been lacking, complicating clinical planning and predictions of health burden in future climate scenarios.