More than 200,000 lives have been lost to the "silent killer" of heat in Europe since 2022, the World Health Organization said Thursday , after a heatwave saw some countries record their highest-ever May temperatures. "The impacts of climate change are a clear and present danger, and its most immediate and lethal manifestation is extreme heat," said Hans Henri Kluge, the WHO's Europe director. "Heat is a silent killer, but it is not an inevitable one," Kluge said at an event in Berlin to launch