After almost a week of sweltering temperatures, Western Europe is bracing for another heatwave. Unlike the first heatwave of the summer, which was relatively short, the current episode promises to be much more persistent. This raises a crucial question: does the body become more vulnerable as the heatwave days follow one another? The 2003 heatwave, which lasted more than two weeks, caused more than 70,000 deaths in Europe. Experts expect such episodes to become more frequent and longer due to