Multiple outlets report that several World Cup group stage matches are played under potentially dangerous heat and humidity. A Guardian analysis finds nine of the group stage games take place in conditions described as severe, highlighting the sport’s exposure to extreme weather. The players’ union, FIFPRO, is cited as warning that heat must play a bigger role in how the sport schedules events going forward. The reporting also notes that expected weather conditions in the midwest and eastern United States could worsen during the week, with the potential to affect both players and fans at upcoming matches. While the specific temperatures and humidity levels are not detailed in the provided excerpts, the accounts align in pointing to a pattern of heat stress during the group stage and linking it to broader climate-related concerns. Overall, the coverage focuses on the immediate conditions at matches and the call for future scheduling and planning to better account for extreme heat.