Games in Miami and Monterrey were at heat level a players’ union had warned in the past should trigger delays Two of the first round of matches at the World Cup were played at a level of severe heat that a football players’ union has previously said should trigger the delay or postponement of gam...
Source: [Guardian Sport](https://www.theguardian.com/football/2026/jun/19/world-cup-matches-severe-heat-level-analysis)