FILE - Akron Stadium, a 2026 FIFA World Cup venue, sits in Guadalajara, Mexico, Thursday, Oct. 16, 2025. Eduardo Verdugo/AP FILE - Fans arrive to the Azteca Stadium for the international friendly soccer match between Mexico and Portugal in Mexico City, Saturday, March 28, 2026. Fernando Llano/AP MEXICO CITY (AP) — Heat won’t be the only environmental factor affecting players’ performance at the World Cup. Teams playing in two of Mexico’s host cities must adapt to another challenge: altitude.