Southern Europe is enduring a punishing heat wave as hot-air masses from Africa and the U.S. collide, pushing temperatures toward record-breaking levels. Portugal and Spain brace for highs over 109°F, while France, Italy, and Greece remain scorched. A marine heat wave in the Mediterranean is further amplifying the crisis. Experts link this extreme weather to human-driven climate change, warning that heat-related deaths have surged 30% in two decades. With 5 billion people projected to face dangerous heat annually by 2050, Europe’s heat crisis is a stark warning for the world.