World Cup Faces Extreme Heat Challenges as Players’ Safety at Risk
The World Cup always promised to be hot. It is turning into something else entirely.
An analysis of the first round of group matches has revealed that two games were played in heat so intense it crossed the red line long set by the global players’ union Fifpro – a level at which matches, it says, should be delayed or postponed. Four more were staged in cities where conditions outside the stadiums also passed that threshold, with only air conditioning preventing the same inside.
This, in what is projected to be the hottest World Cup since the tournament began in 1930.
Miami and Monterrey at the limit
Saudi Arabia’s meeting with Uruguay in Miami stands out as the fiercest contest so far – not for tackles or tempo, but for the sheer brutality of the conditions. Sweden v Tunisia in Monterrey was not far behind.
Both were evening kick-offs. Both were played in wet-bulb temperatures of 28C (82F) or higher, according to official temperature and humidity data for those locations at the time of the games.
That number is not arbitrary. Fifpro has previously argued that matches at or above a wet-bulb temperature of 28C should be delayed or postponed to protect players. Asked about these findings, the union declined to comment on the heat at this World Cup, but its long‑standing position hangs over the early stages of this tournament.
Wet-bulb temperature is the measure that matters here, not just the figure flashing up on a TV graphic. It blends air temperature, humidity and cloud cover to gauge how effectively the human body can cool itself by sweating. At a certain point, sweat simply stops doing its job. The body overheats rapidly. Illness follows. In the worst cases, so does death.
Using data from government agencies in the US and UK, and a formula already employed by authorities in countries such as Australia and Canada, the analysis shows how close this World Cup is sailing to that danger zone.
Dallas, Houston and a tournament on edge
The pressure on organisers is not confined to Miami and Monterrey. Six of the first 24 matches – every team’s opening fixture – were played in places where the wet-bulb temperature hit 28C or higher:
- Germany v Curacao in Houston
- Saudi Arabia v Uruguay in Miami
- Portugal v DR Congo in Houston
- Netherlands v Japan in Dallas
- England v Croatia in Dallas
Houston and Dallas, like a handful of the 16 venues, have air-conditioned stadiums, a technological shield against a roasting North American summer. That shield has already been tested.
England’s opener against Croatia in Dallas on Wednesday produced the most extreme wet‑bulb reading yet: close to 35C (95F) outside. Inside, the air conditioning dragged the temperature down to a far more bearable 22C (71F). Without it, the spectacle – and the risk – would have looked very different.
Fifa, aware of what was coming, shifted some kick-off times later into the day and introduced mandatory water breaks. That has helped. It has not solved everything.
Record temperatures in host cities have left fans fainting and wilting in shadeless concourses. Stadium workers, often on their feet for hours hauling equipment long before a ball is kicked, face conditions that public health experts warn are potentially hazardous.
Guidelines under strain
Fifa’s current guidelines state that cooling breaks should be used when matches are played in temperatures of 32C (89F) or above. In practice, referees at this World Cup have been stopping play for drinks at lower readings, a tacit admission of the strain on players.
Delaying or suspending games remains at the discretion of competition organisers. That discretion is now under scrutiny.
On the eve of the tournament, a group of heat and public health specialists wrote an open letter to Fifa urging stronger protections. They pointed directly to Fifpro’s 28C wet‑bulb threshold and argued that matches should be called off once that line is crossed.
Robbie Parks, an environmental epidemiologist at Columbia University and one of the signatories, underlined the gap between official readings and the reality on the pitch and in the stands.
“Temperatures are often taken from shaded areas and if players are in direct sun, it can be double figures more than the temperature readings,” he said. “Standing in the sun can be dangerous even at lower temperatures, even above 23C (73F) or 25C (77F) would make me concerned for older adults out there for more than few minutes.”
Air conditioning, later kick-offs and water breaks, he said, will help players. The bigger question lies elsewhere.
“Shade is super important and hydration is super important,” Parks added. “You need to allow people to bring in their own water and think about having misters for evaporative cooling. The final is going to be held in New Jersey, and that stadium isn’t covered which makes me worry. But I’d hope Fifa will learn the best way to deal with that by then.”
Climate crisis at the heart of the show
This is not an isolated meteorological quirk. Extreme heat is already the deadliest weather hazard intensified by the climate crisis, killing more people each year than hurricanes, floods and wildfires combined.
The World Cup itself is adding fuel to the problem it is now forced to manage. The staging of more than 100 matches across three vast countries is expected to generate 7.8m tonnes of greenhouse gases, according to estimates by Greenly, a global carbon accounting platform. That is roughly double the emissions associated with the previous World Cup in Qatar.
The sport’s showpiece is being played in conditions its own emissions are helping to worsen.
Fifa’s mitigation playbook
Fifa insists it is ready. A spokesperson said the governing body is “committed to protecting the health and safety of all players, referees, fans, volunteers and staff” at this World Cup.
Meteorologists have been stationed at match venues to help plan for extreme weather. Tournament organisers are working in “close coordination” with host cities, stadium authorities and national agencies, the spokesperson said, under a “tiered mitigation model” that triggers extra measures as temperatures rise.
For players, those measures include mandatory hydration breaks, free access to water and electrolyte drinks, and a battery of cooling tools: ice, cold towels, fans, mist and shade.
For spectators, elevated temperatures are meant to prompt stadiums to “activate additional cooling capacity, including shaded areas, misting systems, cooling buses and expanded water distribution”.
Medical protocols have been rewritten too. A new set-piece response for heat exertion is in place, with cooling bags to be used for the first time at a World Cup.
Fifa says it will “continue to monitor conditions in real time, integrating wet bulb globe temperature and heat index surveillance, and stands ready to apply established contingency protocols should extreme weather events occur.”
The question now is how often those contingencies will be needed – and whether, as the tournament moves towards its uncovered final in New Jersey, football’s biggest show can keep outrunning the heat closing in around it.
