[REVISION HISTORY]

Global Heatwave Safety and Health Risk Updates

Updated 17 times since CLSTR started tracking revisions of this situation.

What changed

2026-08-13 11:57 UTC → 2026-08-13 13:28 UTC · added ~~removed~~

Global heatwave safety guidance continues to expand as medical experts warn of rising mortality and cardiovascular risks. Extreme heat is linked to increased deaths and heart attacks in Paris and Turkey. Neurologists highlight that heatstroke can lead to mental confusion, loss of consciousness, permanent brain damage, or organ failure. Physiological risks include electrolyte imbalances—affecting sodium, potassium, magnesium, calcium, and chloride—that cause irregular heart rhythms, increased blood viscosity, and heightened risks of clots and strokes. Vascular surgeon Dari Jocić warns that heat causes blood vessels to dilate to regulate temperature, which can exacerbate problems for those with poorly functioning venous valves, leading to swelling, heaviness, and pain in the ankles and feet. In care facilities like Dom Trnje in Zagreb, staff are implementing strict protocols, such as avoiding sun exposure between 10:00 and 17:00 and prioritizing hydration monitoring for elderly residents. In Turkey, healthcare professionals report a direct link between rising temperatures and an increase in chronic heart and kidney diseases. Doç. Dr. Yasemin Saygıdeğer reports a 20% increase in respiratory-related emergency and outpatient visits over the last two years, driven by heatwaves, air pollution, and high humidity. This has prompted the launch of the EU-supported ‘CLIMARESP-ADANA’ project to research solutions to this respiratory crisis. ~~Newer data highlights specific biological~~ Experts note that high temperatures can impair kidney filtration, and ~~regional vulnerabilities.~~ in Turkey, it is estimated that one in every 6 to 7 people is at risk of chronic kidney disease. In Greece, Dr. Konstantinos Delis notes that summer habits like eating large late-night meals or consuming alcohol can exacerbate gastroesophageal reflux disease (GERD). In Spain, the Daily Mortality Monitoring System (MoMo) estimates 27,564 deaths were attributable to high temperatures between 2015 and 2025, with urban centers like Madrid and Sevilla showing high vulnerability among those living alone. ~~Additionally, Eleonora Guadalupi, head of the West Consultori at Ausl Bologna, notes that women face higher risks due to physiological factors affecting heat dissipation.~~

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