Recent research highlights the increasing danger of extreme heatwaves, which are creating potentially unsurvivable conditions for humans. A study published in Nature Communications re-evaluated six major heatwaves from 2003 to 2024, revealing their deadly impact, particularly on older individuals. The research indicates that the combination of high temperatures and humidity impairs the body's ability to cool itself through sweat evaporation, leading to heatstroke. The study suggests that the assumed human survival limit of a six-hour exposure to a wet bulb temperature of 35°C (95°F) is being challenged, as none of the examined heatwaves reached this threshold yet resulted in thousands of deaths.