A significant heat wave is expected to continue across the eastern and central United States through the end of the week, with peak heat indexes potentially reaching between 100 F to 115 F (37.78 C to 46.11 C). This weather pattern poses risks for both athletes and spectators at the World Cup, particularly for Saturday’s afternoon knockout round game between France and Paraguay in Philadelphia. High night temperatures are anticipated to offer little relief, and record temperatures could be broken.
Concerns regarding extreme heat during the games in the U.S., Canada, and Mexico have been growing for several months. Some scientists have described FIFA’s heat safety guidelines as “inadequate” and “impossible to justify,” even for players who are accustomed to heat. For fans, this could lead to matches that are slower and less intense.
The world has warmed approximately 1.26 F (0.7 C) in the last three decades since the U.S. last hosted the World Cup. This increase in global temperatures intensifies heat waves and makes other severe weather events more common. Scientists from the World Weather Attribution stated that the humid heat currently affecting the country, as well as parts of Canada, would have been “virtually impossible” without climate change.
Heat’s Impact on Performance and Safety
Heat affects individuals both from their surroundings and as their bodies warm during physical exertion, making it more difficult to cool down in hot and humid conditions. Bharat Venkat, director of the Heat Lab at the University of California, Los Angeles, noted that the likelihood of experiencing heat-related illness or even death is significantly higher when exercising intensely on a hot day. Symptoms of exertional heat illness can include extreme fatigue, impaired performance, headache, irritability, nausea, dizziness, cramping, and dehydration. Exertional heat stroke, which requires immediate medical attention, is a leading cause of death among athletes.
When the wet bulb globe temperature, which accounts for temperature, humidity, cloud cover, and wind, exceeds approximately 95 F (35 C), individuals lose their ability to cool off rapidly, leading to a breakdown of physiological mechanisms. Ryan Calsbeek, a professor of biological sciences at Dartmouth College, also suggested that heat-induced confusion could impact a player’s decisions and potentially influence a match’s outcome.
Mandatory three-minute hydration breaks midway through each half are in place to protect players and referees from extreme heat illness. However, these breaks have drawn criticism; some argue they disrupt the game’s flow and allow coaches to shift momentum, while some scientists contend the breaks should be longer to allow for meaningful cooling and rehydration during extreme heat. FIFA has also stated that matches outdoors during peak heat hours have been limited, and those scheduled during warmer windows are prioritized for covered stadiums.
FIFA’s guidelines indicate that a match could be postponed if the wet bulb globe temperature reaches 89.60 F (32 C). However, Douglas Casa, CEO of the University of Connecticut’s Korey Stringer Institute, highlighted that this temperature is so extreme that military basic training facilities in America halt all training when it reaches 32. The players’ union FIFPRO and the American College of Sports Medicine have advocated for matches to be delayed at 82.40 F (28 C) for safety reasons. Temperatures are forecast to exceed 100 F (37.78 C) during Saturday’s game in Philadelphia.
Mitigation and Community Impact
Players can train to adapt to heat stress during exercise. Guilherme Passos, a sport scientist at the Brazilian Football Federation, monitors and prepares Brazil’s national team for extreme heat. He has assisted the team in acclimatizing to the U.S. heat, noting that exposing players directly to the hottest part of the day can diminish training quality. The team employs saunas or hot baths for heat training during the competition.
During the World Cup in 2014, when Brazil hosted, players covered less distance and reduced high-speed running, instead focusing on technical and tactical precision. Calsbeek emphasized that soccer players require extreme endurance, explosive speed, and the ability to make critical decisions, all of which are affected by temperature.
The risks extend beyond players to spectators, many of whom consume alcohol while watching the World Cup, which is risky in hot conditions. Cities and stadiums have increased access to shade, cooling areas, water, and medical personnel are stationed at FIFA Fan Festivals and around stadiums. Calsbeek warned that spectators, who may be dehydrated and excited, are likely to experience negative effects in extreme temperatures.
The match between France and Paraguay is scheduled for Saturday afternoon in Philadelphia, with temperatures expected to approach or exceed 100 F (37.78 C) at kickoff.
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Source: apnews.com
