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Olympics: Weather watchers record temp of 30 C in Tokyo at 6 a.m. marathon starting time

A Weathernews staff member measures the temperature along the 2020 Tokyo Olympics marathon race course on Aug. 2, 2019, exactly a year to go until the women's race for the summer games will be held. (Kyodo)

TOKYO (Kyodo) -- The temperature near the new National Stadium located in central Tokyo, where the Olympic marathon will start and finish, hit 30 C at 6 a.m. on Friday, Japan-based weather service provider Weathernews said.

With exactly one year to go until the 2020 Olympic women's marathon, which starts at 6 a.m., the Weathernews team measured the temperature along the route, stopping their vehicle every 5 kilometers to take readings.

In addition to the sweltering heat, they also measured humidity levels of more than 70 percent as of 6 a.m.

"There were some thin clouds. Once you're exposed to direct sunlight the temperature will feel different," said Kazuo Asada, who runs the sports meteorology team at Weathernews and is also a member of the science committee at the Japan Association of Athletics Federations.

The statistical data they collected will be used to plan measures to safeguard runners against heat-related illnesses.

The women's marathon at the Tokyo Olympics will start at 6 a.m. on Aug. 2, and the men's marathon at the same time on Aug. 9.

Originally, the start time was set for 7:30, which was then revised to 7 a.m. before it was moved again to counter the possible health risks to athletes, spectators and workers.

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