With fewer than four weeks remaining before the start of the 2026 World Cup, scientists are warning that extreme temperatures could become a major challenge during the tournament across the United States, Mexico and Canada.
Researchers say forecasts for 2026 point to the possibility of unusually high global temperatures, raising concerns that heat waves and other weather extremes may affect both players and supporters during football’s biggest competition.
The tournament is scheduled to begin on 11 June and will take place in 16 cities spread across the three host nations during the height of the northern hemisphere summer. While Canadian venues are expected to experience relatively milder conditions, experts believe several cities in the United States and Mexico could face severe heat if current climate patterns continue.
Scientists have repeatedly indicated that 2026 has the potential to rank among the hottest years ever recorded. The World Meteorological Organization has also forecast above-average temperatures across many parts of the world, adding to concerns surrounding the competition.
The issue of extreme heat has become increasingly prominent in football in recent years, especially during summer tournaments where athletes are required to play demanding matches over short periods of time.
Health experts and climate researchers warn that long exposure to high temperatures can have serious effects on physical performance and recovery. They say excessive heat may place additional strain on players already coping with intense schedules and competitive pressure.
Concerns are also being raised for supporters attending matches. Fans are expected to spend extended periods outdoors and inside crowded stadiums, conditions that specialists say could increase the risk of heat-related illness if temperatures rise significantly during the tournament.
Football’s governing body FIFA has previously introduced cooling breaks during competitions held in particularly hot climates. Similar measures are expected to be used again during the 2026 World Cup in an effort to reduce the impact of extreme weather on players.
The growing debate surrounding conditions at the tournament reflects broader concerns about climate change and the increasing frequency of extreme weather events worldwide.
Scientists have recently pointed to a series of record-breaking environmental changes, alongside a rise in severe weather conditions affecting different regions across the globe. The warnings surrounding the World Cup are therefore seen by many experts as part of a wider conversation about how international sport adapts to changing climate conditions.
Attention has traditionally focused on stadium readiness, transport systems and security arrangements ahead of major sporting events. However, climate specialists say organisers must now also consider how unpredictable weather could affect scheduling, player safety and fan experience.
The concerns come as football authorities continue to face questions about how future tournaments will operate in increasingly difficult environmental conditions. With matches set to be played across a vast geographical area during one of the hottest periods of the year, scientists say the 2026 World Cup could become a significant test of how global sport responds to rising temperatures.
Although tournament organisers have already planned measures to deal with hot weather, experts suggest the event may still highlight the growing challenge climate change presents for outdoor sport.
