European summers are breaking temperature records with increasing regularity, and this film asks how much worse it can get. In Seville, physicist José María Martín-Olalla explains a project that names impending heatwaves the way storms are named, part of an effort to warn residents that a 45-degree heatwave can push excess mortality up by 30 to 40 percent. A human physiologist from the Dutch research organization TNO walks through the body's cooling mechanisms and the point at which they fail. The film revisits Paris in the record summer of 2003, when conditions turned genuinely deadly, and climate scientists discuss why 50-degree readings in the French capital are no longer out of the question. Outside the cities, Andalusian farmers describe drought and heat squeezing harvests, while researchers track rising Mediterranean sea temperatures. Interviews with scientists across Europe are paired with footage from affected cities and farmland, building toward the adaptation strategies now being tested, from urban cooling design to early-warning systems.