Climate scientists are warning that grueling heat could impact quarter of World Cup games during the 2026 tournament, as rising global temperatures significantly increase the risk of extreme weather across North America. A new analysis suggests that the combination of high humidity and soaring temperatures could push a substantial number of matches into dangerous territory for both athletes and spectators.
The warning comes from World Weather Attribution (WWA), a global network of climate scientists, who found that 26 of the 104 scheduled matches are estimated to take place in conditions reaching at least 26 degrees Celsius Wet Bulb Globe Temperature (WBGT). This index is more critical than standard temperature readings because it accounts for humidity, wind speed, and solar radiation to determine how effectively the human body can cool itself.
The risk profile for the 2026 event, hosted across the United States, Mexico, and Canada, is starkly different from the last time the U.S. Hosted the tournament in 1994. Scientists note that the probability of experiencing extreme heat has nearly doubled over the last three decades, creating a new set of logistical and medical challenges for FIFA and tournament organizers.
The critical threshold of Wet Bulb Globe Temperature
To understand the danger, it is necessary to look beyond the thermometer. While a standard temperature reading tells us how hot the air is, the WBGT index measures the actual heat strain on the human body. When humidity is high, sweat cannot evaporate from the skin, preventing the body from shedding heat and increasing the risk of heatstroke and cardiovascular collapse.
According to the international footballers’ union FIFPRO, a WBGT of 26°C is the threshold where heat strain becomes a significant risk. At this level, the union recommends mandatory cooling breaks to allow players to hydrate and lower their core body temperatures. WWA estimates that one in four matches in 2026 will hit or exceed this mark.
Even more concerning are the “cancellation-level” conditions. The analysis indicates that five games are expected to reach a WBGT of 28°C or higher. At this intensity, FIFPRO suggests that matches should be delayed or postponed entirely to ensure the safety of the participants and the crowd.
| Metric | 1994 World Cup (Est.) | 2026 World Cup (Est.) |
|---|---|---|
| Matches hitting 26°C WBGT | 21 games | 26 games |
| Risk of 28°C+ WBGT | Lower Baseline | Nearly Doubled |
| Primary Risk Factor | Seasonal Variation | Systemic Global Warming |
Infrastructure gaps and fan vulnerability
While professional athletes have access to elite medical teams and specialized recovery gear, the risk extends to millions of fans gathering in outdoor stadiums. Friederike Otto, a climate science professor at Imperial College London and co-founder of WWA, emphasized that spectators are often in a more precarious position because they lack the constant medical supervision provided to players.
The tournament will utilize 16 stadiums, but only three—located in Dallas, Houston, and Atlanta—are equipped with full air conditioning systems. This creates a disparity in safety. while 17 of the 26 high-risk matches will be played in venues with cooling systems, more than a third of the games with a significant chance of exceeding 26°C WBGT will take place in stadiums without such protections.
This infrastructure gap means that in several host cities, the only defense against grueling heat will be the mandated cooling breaks and hydration stations, which may not be sufficient for fans exposed to direct sunlight for several hours.
High stakes for the World Cup Final
The analysis specifically highlights the risk associated with the tournament’s climax. The final, scheduled for July 19 at MetLife Stadium in New Jersey, faces a one-in-eight chance of reaching the 26°C WBGT threshold. More alarmingly, there is a 2.7% risk that the final could be played in 28°C WBGT conditions—the level at which postponement is recommended.
Professor Otto described the possibility of the world’s biggest sporting event facing “cancellation-level” heat as a necessary wake-up call for the sporting world. The fact that even a temperate region like New Jersey could see such extremes in July underscores the shifting climate baseline in North America.
The warning has resonated at the highest levels of international policy. Simon Stiell, the executive secretary of UN Climate Change, noted on social media that the doubling of dangerous heat risks since 1994 puts both players and fans in jeopardy. Stiell argued that this trend highlights the urgent need to accelerate the global transition to clean energy to protect the future of international sport.
FIFA’s contingency strategy
In response to the findings, FIFA has stated that it is implementing several preventive measures to mitigate weather-related risks. The governing body has already mandated cooling breaks during each half of matches scheduled between June 11 and July 19.
FIFA indicated it will utilize real-time monitoring, integrating both WBGT and heat index surveillance to track conditions as they evolve. The organization stated it stands ready to apply “established contingency protocols” should extreme weather events occur during the tournament.
These protocols typically include adjusted kickoff times, increased water availability, and, in extreme cases, the postponement of matches. However, the scale of the 2026 tournament—spanning three countries and 104 matches—makes the coordination of such contingencies a massive logistical undertaking.
As the tournament approaches, the focus will shift to how these contingency plans are operationalized on the ground, particularly in venues lacking climate control. The next major milestone for organizers will be the finalization of stadium operational blueprints, which are expected to incorporate specific heat-mitigation strategies for fan zones and seating areas.
This article is for informational purposes and does not constitute medical advice. For guidance on managing heat-related illness, please consult a healthcare professional or official public health guidelines.
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