Chelsea defied expectations on July 13 with a stunning 3-0 win against reigning European champions Paris Saint-Germain in the Club World Cup final. Players battled through scorching 85°F heat at MetLife Stadium in New Jersey, a persistent problem throughout the four-week tournament.   Extreme temperatures peaked when a record-breaking heat dome settled over the U.S. in late June. Amid a heat emergency in Philadelphia, Chelsea manager Enzo Maresca said it was “impossible” to train properly