Heat stress could negatively affect players' performance and pose a threat to their health, say these writers. ST CATHARINES, Canada: The most-watched sporting event in the world kicks off on Jun 11 co-hosted by Canada , Mexico and the United States. With 2026 already expected to be one of the hottest years on record, experts and players have warned that organiser FIFA is not doing enough to protect the players from extreme heat. Our new research shows the heat stress players may face could