A new scientific study has warned that the 2026 FIFA World Cup could face significant heat-related risks, raising concerns for both players and fans as extreme temperatures become more likely across host nations.
The analysis, conducted by climate research group World Weather Attribution, found that around one-quarter of the 104 matches scheduled in the United States, Mexico and Canada may be played under conditions exceeding safety thresholds recommended by players’ union FIFPRO.
Read More: Ronaldo enters 6th World Cup looking to show he can thrive despite Saudi Arabia
Researchers said the likelihood of dangerous heat conditions has nearly doubled compared to the 1994 World Cup in the United States. They estimated that approximately five matches could take place in conditions considered unsafe, where postponement would normally be advised.
World Cup could see dangerous heat and humidity, experts warn https://t.co/itWkEqnBZP
— Sky News (@SkyNews) May 14, 2026
The study assessed heat risk using the Wet Bulb Globe Temperature (WBGT) index, which measures the body’s ability to cool itself under heat and humidity. According to FIFPRO guidelines, cooling breaks are recommended above 26°C WBGT, while matches should be postponed if conditions exceed 28°C.
FIFPRO’s medical experts said the findings highlight the need for stronger heat-mitigation strategies, including hydration breaks, cooling infrastructure, and flexible scheduling to protect player health and performance.
FIFA responded by stating that it has implemented a range of measures, including cooling breaks in each half, enhanced medical readiness, and infrastructure adjustments to manage heat exposure for players, officials and spectators.
Experts, however, warned that extreme heat may affect playing style even if it does not lead to widespread medical emergencies. They suggested players may adopt slower, more controlled pacing during matches.
The study also noted that more than a third of matches with a significant risk of high heat are scheduled in stadiums without air conditioning, including venues in Miami, New York, Kansas City and Philadelphia. Even the final at MetLife Stadium faces measurable risk of exceeding recommended heat thresholds.
Read More: Fifa plans major yellow card rule change for world cup 2026
Climate scientists have urged FIFA to reconsider scheduling future tournaments outside peak summer months, arguing that earlier or later dates could reduce health risks and improve conditions for both athletes and fans. The findings add to growing global concerns over how climate change is increasingly affecting major sporting events.