Fans have been gathering across the US, Canada and Mexico, as well as the world's TV screens, to watch the 2026 men's football World Cup kick off.
球迷们聚集在美国、加拿大和墨西哥各地，以及世界各地的电视屏幕前，观看2026年男子足球世界杯开赛。
However, experts have been increasingly worried about the effect of summer heat and humidity on the competing players.
然而，专家们越来越担心夏季高温和潮湿对参赛球员的影响。
High levels of both have been predicted for a number of the tournament venues.
据预测，多个比赛场馆都将出现高温和高湿。
Previous competitions held in similar conditions have caused difficulties for players and officials.
之前在类似条件下举办的比赛给球员和官员带来了困难。
Assistant referee Humberto Panjoj collapsed during a Copa America game in Kansas City in 2024.
助理裁判温贝托·潘霍伊在2024年堪萨斯城的一场美洲杯比赛中昏倒。
In a game in Miami in the same competition, Uruguayan defender Ronald Araujo was substituted, complaining of dehydration and dizziness.
在同一赛事迈阿密的一场比赛中，乌拉圭后卫罗纳德·阿劳霍因抱怨脱水和头晕而被替换下场。
Players also complained about conditions at the 2025 Club World Cup in the US.
球员们还对2025年在美国举行的俱乐部世界杯的条件提出了抱怨。
Both these competitions were played in cities that feature in the 2026 World Cup.
这两项赛事都在2026年世界杯举办城市举行。
Sports Medicine Australia warns of the dangers of heat exhaustion, heat stroke and dehydration from exercising in hot and humid conditions.
澳大利亚运动医学机构警告说，在炎热潮湿的环境中运动存在中暑、热射病和脱水的危险。
Experts suggest that the key measure to assess risk from heat and humidity is the wet bulb globe temperature.
专家建议，评估高温和潮湿风险的关键指标是湿球黑球温度。
When we sweat, it usually evaporates, cooling us down.
当我们出汗时，汗通常会蒸发，给我们降温。
Humid conditions make this process less effective.
潮湿的环境会使这一过程效果降低。
Wet bulb globe temperature is the minimum temperature achieved after water has evaporated.
湿球黑球温度是水蒸发后达到的最低温度。
Many experts suggest that heat can be a problem for athletes if the wet bulb globe temperature is above 28C.
许多专家表示，如果湿球黑球温度高于28摄氏度，高温可能会对运动员造成问题。
14 out of 16 of the World Cup venues have been forecast to have wet bulb globe temperatures above this level during normal summer afternoons.
据预测，16个世界杯场馆中有14个在普通夏季午后的湿球黑球温度将高于这一水平。
For this reason, many games have been moved to evening kick offs, and cooling breaks have been scheduled.
因此，许多比赛已改到晚上开球，并安排了冷却暂停时间。
Additionally, some stadiums have roofs and air-conditioning.
此外，一些体育场有顶棚和空调。
However, concerns remain around evening games in Miami and Kansas City, which had been predicted to be hot and humid, and the final in New Jersey, which was scheduled for 3pm.
然而，对迈阿密和堪萨斯城的晚间比赛仍然存在担忧，这些比赛预计将炎热潮湿，而新泽西的决赛定于下午3点。
Estimates are based on a normal summer.
这些估计基于一个普通的夏季。
However, the situation would be considerably worse should there be a heatwave.
然而，如果出现热浪，情况将会严重得多。
