TOKYO, JAPAN — In a direct response to record-high temperatures and stifling humidity, organizers of the World Athletics Championships have moved up the start times for the race walk and marathon events by 30 minutes. The new 7:30 a.m. (22:30 GMT) start time is a critical measure to protect athletes and staff from the extreme Tokyo heat.
A Battle Against Record Heat
Japan has experienced extreme weather this year, with temperatures in Tokyo in September remaining unseasonably high, averaging 33 degrees Celsius (91.4 degrees Fahrenheit). This has created a health and safety risk for the athletes, prompting the organizers’ decision. A statement from the local organizing committee explained the move: “Despite the world championships being scheduled for mid-September when temperatures were expected to be lower than during the summer in Tokyo, levels this year have remained at those of mid-summer.” The city’s fire department reported that over 3,300 people were taken to the hospital for heat stroke last month, underscoring the severity of the heat.
Lessons from Previous Games
The high-stakes decision to adjust the schedule reflects past lessons on extreme heat. At the pandemic-delayed 2021 Olympics, the marathon was moved to Sapporo to escape Tokyo’s summer conditions, although temperatures in the two cities ultimately ended up being similar on race day. This year, with highs of 31-34 °C and humidity levels of 75% expected over the weekend, proactive measures are considered essential.
Countermeasures on the Course
Beyond adjusting the schedule, organizers have implemented a series of heat countermeasures. The marathon route will feature 185 water stops—more than what was planned for the Tokyo Olympics—to ensure athletes can stay hydrated. To protect athletes and visitors, tents made of radiative cooling fabrics will be set up at the stadium and warm-up venue. Additionally, volunteers and staff will be monitored for heat stroke using watch-style devices that track core body temperature and sound an alarm if levels become dangerous.
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