Greece heatwave raises heart and diabetes risks

Greek health authorities warn that the current heatwave intensifies strain on the cardiovascular system and worsens control of diabetes. Experts note that each degree rise in body temperature can increase heart rate by about 10 beats per minute, boosting cardiac workload two‑to‑four times and raising the risk of heart attacks, especially in patients with pre‑existing conditions. A meta‑analysis cited by the Hellenic Cardiology Society found a 15 % rise in cardiovascular mortality during heat peaks, climbing to 51 % after five consecutive days above 35 °C, with people over 65 experiencing up to a 24 % increase. Elevated temperatures also raise humidity, pushing wet‑bulb temperatures above the 25 °C danger threshold and heightening dehydration risk. For diabetics, especially those on SGLT‑2 inhibitors, heat‑induced fluid loss can trigger hyperglycaemia, hypotension and acute kidney injury. Authorities advise staying hydrated with water, electrolyte‑rich foods, cool environments, limiting alcohol, avoiding strenuous activity during 11 a.m.–3 p.m., and monitoring blood pressure and glucose levels closely.