The FIFA World Cup is taking place from June 11 to July 19, 2026, in the U.S., Canada and Mexico. While countries fight for victory on the soccer pitch, an unforeseen competitor is lurking on the sidelines: climate change. Increased heat and humidity can make playing long games outdoors a health hazard.
How does heat affect the tournament?
Climate change is “boosting the likelihood of performance-impairing heat during most scheduled World Cup matches (97 of 104),” said an analysis by Climate Central. Among those matches, “nearly half (49) have at least a 50% likelihood of experiencing heat that can impair performance” and in “26 of those matches, climate change increases the likelihood by at least 10 percentage points.”
It is “pretty safe to say climate change is going to have a mark on this World Cup,” and it is “not just going to be hotter, but it’s also going to increase the humidity as well,” Kaitlyn Trudeau, a senior research associate of climate science for Climate Central, said to the Los Angeles Times. Several World Cup locations are expected to exceed 78 degrees Fahrenheit with no internal cooling systems.
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Intense exertion in high levels of heat and humidity could have dire health effects. In these conditions, the “body’s normal cooling system begins to struggle,” said Reuters. “Humidity is a particular concern, since sweat cools the body only when it evaporates.” In addition, “75% of all the energy that we utilize during exercise gets converted to heat,” Chris Minson, a physiology professor and co-director of the Exercise and Environmental Physiology Labs at the University of Oregon, said to Reuters. “Only about 25% goes to actually doing the exercise.” Excessive sweating because of heat “could lead to dehydration, cramps and increased fatigue,” said Al Jazeera.
How will future World Cups be affected?
As climate change is only expected to get worse over time, there have been “discussions on moving the start of the tournament from June to March or October after 2030,” said the Los Angeles Times. For now, “early kickoffs, cooling breaks, air-conditioned stadiums and regular weather-related delays will necessarily become common features of the tournament.”
High temperatures and humidity are “likely to slow games down,” Ryan Calsbeek, a biological sciences professor at Dartmouth College, said to Reuters. “When athletes have to perform for a very long time, they’re just not going to be able to balance the explosive power of their fast-twitch efforts with the more aerobic long-term efforts of a 90-plus-minute game.”
Along with being affected by climate change, the World Cup is apparently going to make it worse. “FIFA seems intent on fueling the fire,” said an analysis by the New Weather Institute. It is estimated that the North American World Cup “will be responsible for at least 9.0 million tons of carbon dioxide.” The increased number of participating teams, as well as the expanded geographic area of the tournament, means more people are traveling around and polluting. “Unlike in parts of Europe or Asia, there is a notable absence of low-carbon alternatives such as high-speed rail networks connecting major host cities.”
