The 2026 World Cup 2026 kicks off on June 11 across the United States, Mexico and Canada — and for millions of supporters travelling from cooler climates, the welcome could feel less like a festival and more like stepping into an oven. A mounting body of scientific research, a controversial last-minute rule change from FIFA, and a summer already showing its teeth have combined to make extreme heat one of the defining storylines of the tournament before a single ball has been kicked.
This is what fans can expect — and what football’s governing body is, and isn’t, doing about it.
A Quarter of Matches Could Hit Dangerous Heat Levels
The numbers are stark. According to a new analysis by the climate modelling organisation World Weather Attribution (WWA), a quarter of the 104 scheduled matches are likely to be played under heat conditions that pose a genuine threat to both players and supporters.
Venues including Dallas, Houston, Miami and Monterrey already regularly experience June and July humid heat levels that place players at risk, with wet-bulb temperatures — a measure that factors in both air temperature and humidity — of 28°C or higher.
The wet bulb globe temperature (WBGT) system is the key metric here. The widely accepted safe-play benchmark sits at 35°C, representing the upper limit of the human body’s natural cooling system. Beyond that threshold, the risk of heatstroke and dehydration rises sharply — for players and spectators alike.
Crucially, this is not simply a matter of the sun feeling hot. The frequency of extremely hot June-July days has tripled, on average, across the ten cities that previously hosted World Cup matches in 1986 and 1994. Climate change is not a background factor here. It is an active co-organiser of this tournament.
The Fan Experience: Hours in the Heat Before a Ball Is Kicked
The biggest risk for supporters does not begin at kick-off. It begins far earlier.
Even in the hottest cities, where indoor venues may offer some protection during the match itself, tens of thousands of fans will still spend hours travelling, queueing and celebrating in dangerous outdoor heat. Many supporters arriving from Europe, Asia or South America will be older, less physically conditioned than elite athletes, potentially dehydrated from alcohol consumption, and arriving from significantly cooler climates with little acclimatisation.
The 2026 World Cup is expected to break all attendance records, drawing over five million fans to stadiums across Canada, Mexico and the US between June 11 and July 19. Most of those stadiums are open-air, leaving supporters exposed to peak summer heat.
The Guardian’s analysis of tournament conditions painted a particularly alarming picture in cities such as Miami, Dallas and Philadelphia, where combinations of heat and humidity could push conditions into genuinely hazardous territory during afternoon kick-offs — even factoring in direct sunlight and urban heat effects.
FIFA’s Water Bottle U-Turn: The Controversy That Has Enraged Fan Groups
If the heat itself wasn’t enough, FIFA’s handling of basic supporter welfare has drawn intense criticism just days before the tournament begins.
The governing body has performed a dramatic last-minute U-turn on its stadium code of conduct, banning fans from bringing reusable water bottles into venues. Only three weeks ago, that same code of conduct explicitly stated that “empty, transparent, reusable plastic bottles, up to one litre in capacity, may be brought into the Stadium.” That clause has since been deleted entirely, replaced by a directive stating that reusable water bottles may not be brought in at all.
Emails were sent directly to ticket holders informing them that previous guidance was no longer valid. The timing of the reversal — with the tournament days away — has drawn immediate and forceful condemnation from supporter organisations.
The Football Supporters’ Association (FSA) said it had been explicitly assured in discussions that fans would be able to bring their own bottles. A spokesperson for the organisation told The Athletic that fan welfare should be FIFA’s primary concern “and not the ability to sell more bottled water at inflated prices.”
England fan group Free Lions, affiliated with the FSA, questioned on social media why fans were being banned from bringing bottles given how hot the open-air stadiums would be, and described the move as a “strange, late change.” They added that supporters would naturally interpret the reversal as a commercial decision.
During last summer’s FIFA Club World Cup, also held in the United States, water bottles were sold in stadiums for between $4 and $6 each. FIFA has confirmed that pricing at the 2026 World Cup will remain consistent with previous events at each venue, but has not published specific figures.
What FIFA Has Done — and What Critics Say Isn’t Enough
FIFA has not been entirely passive. The governing body has introduced mandatory three-minute hydration breaks midway through each half at every match in the tournament, regardless of venue or weather conditions, and has established a Heat Illness Mitigation and Management Task Force.
Match scheduling has also been adjusted, with daytime games in hotter cities largely assigned to air-conditioned stadiums in Dallas, Houston and Atlanta, while higher-risk venues are set to host evening kick-offs. FIFA has also pledged cooling infrastructure for supporters, including misting stations, cooling tents and hydration stations around stadium footprints.
But the consensus among scientists and supporter groups is that these measures fall short.
FIFA’s formal guidance only mandates consideration of suspension or postponement at WBGT levels above 32°C — a threshold critics argue is far too high in light of modern understanding of heat illness and exercise physiology.
Experts have warned that moving games to evening slots is insufficient on its own. The risk extends well beyond the 90 minutes on the pitch, and FIFA’s current heat policy does not adequately account for the hours supporters spend outside stadiums in uncontrolled conditions.
The Club World Cup Warning Sign
The 2025 FIFA Club World Cup, held across the United States last summer, provided a vivid preview of what to expect in 2026.
Chelsea head coach Enzo Maresca cut short a training session in Philadelphia as temperatures reached 37.2 degrees Celsius, while Borussia Dortmund took the unusual step of keeping substitutes in the dressing room during the first half of a match in Cincinnati rather than expose them to blazing sunshine on the bench.
Dortmund head coach Niko Kovac went so far as to suggest the weather, rather than quality, could determine who lifts the 2026 World Cup trophy.
A study published in the International Journal of Biometeorology confirmed that 14 of the 16 host cities used for the 2026 tournament experienced temperatures that frequently exceeded accepted WBGT safety thresholds, and called for matches to be scheduled outside afternoon windows when conditions are at their most severe.
The Bigger Picture: A Last World Cup of Its Kind?
There is a dimension to this story that extends beyond this summer’s logistics.
The “Pitches in Peril” report by the Football for Future non-profit warned that by mid-century, nearly 90% of World Cup host stadiums will face unsafe extreme heat conditions, and that 11 stadiums will experience what researchers classify as unplayable heat. The report suggested the 2026 tournament “could be the last World Cup of its kind” in North America.
Professor Friederike Otto of Imperial College London, one of the authors of the WWA report, said the risk of the World Cup Final itself being played in heat categorised as “cancellation-level” should serve as a wake-up call for FIFA and fans alike, and underlined that no aspect of society — including elite sport — is insulated from climate change.
A group of current and former professional players wrote an open letter to FIFA calling for stronger protection ahead of the tournament, and separately raised concerns about the presence of oil and gas company Aramco among the tournament’s sponsors.
The irony is difficult to ignore. FIFA has spent years positioning football as a vehicle for sustainability messaging, promoting a “green card for the planet” narrative. Yet the 2026 World Cup is increasingly defined by the very climate crisis that football — and its sponsors — cannot escape.
What This Means for Fans Travelling to the Tournament
For the millions of supporters making the trip to North America this summer, the heat is not a hypothetical inconvenience. It is a genuine health consideration.
Fans from cooler climates — Europe, East Asia, South America’s southern cone — face the highest risk. Without acclimatisation, several days at these temperatures can overwhelm the body’s natural cooling systems even without physical exertion. Spending five or six hours outdoors on match day, including queuing, walking between transport and the stadium, and sitting in direct sunlight, multiplies that risk significantly.
The removal of the personal water bottle allowance makes the picture worse. Supporters who had planned ahead based on FIFA’s original guidance now face the prospect of either relying on stadium vendors — at premium prices — or going without adequate hydration during one of the most physically demanding spectator experiences on the planet.
FIFA’s messaging about misting stations and hydration points outside stadiums offers partial reassurance. But the gap between the governing body’s stated commitment to fan safety and the practical reality of its decisions has rarely felt wider.
What Happens Next
The tournament begins on June 11 with South Africa versus Mexico at the Estadio Azteca in Mexico City. FIFA has confirmed it is working closely with each host city committee and local authorities on heat mitigation measures, but the water bottle policy as it currently stands will be in effect from opening day.
With pressure from supporter groups unlikely to ease and scientific warnings growing louder, FIFA faces calls to reconsider its approach before the first kick-off. Whether the governing body responds before the heat does will be among the first major stories of the 2026 World Cup.
FAQ
Which 2026 World Cup venues have the most dangerous heat? Dallas, Houston, Miami and Monterrey are consistently identified by climate scientists as the highest-risk venues, with all four regularly recording wet-bulb temperatures at or above recommended safety limits during June and July.
Why has FIFA banned water bottles from World Cup stadiums? FIFA updated its Stadium Code of Conduct in the days before the tournament to prohibit reusable water bottles, reversing guidance issued only weeks earlier that had explicitly permitted them. The governing body has not given a specific explanation beyond confirming the policy change. Fan groups have characterised the move as a commercial decision designed to increase stadium water sales.
How dangerous is the heat for fans at the 2026 World Cup? Research by World Weather Attribution suggests around a quarter of matches will be played in conditions exceeding recommended safety thresholds. Fans from cooler climates who have not acclimatised, older supporters, and those who consume alcohol are at elevated risk of heat-related illness. The risk extends well beyond the stadium — transport, queuing and time spent outdoors before and after matches significantly increases overall heat exposure.
What measures has FIFA put in place to protect fans? FIFA has mandated three-minute hydration breaks in each half of every match, adjusted kick-off times in some venues, and pledged misting stations, cooling tents and hydration points around stadium footprints. Critics argue these measures are insufficient given the scale of the heat risk.
Could any 2026 World Cup matches be postponed due to heat? Under FIFA’s current regulations, formal consideration of suspension or postponement only applies at WBGT levels above 32°C. Several climate scientists have described that threshold as dangerously high, but no changes to those regulations have been announced ahead of the tournament.
