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Philipp Kohlschreiber from Germany wipes his face during tennis practice at the Olympics. Photo: Michael Kappeler/picture alliance via Getty Images

A heat wave in Tokyo pushing temperatures into the 90s with high levels of humidity has posed yet another challenge for athletes competing in the Olympic Games.

Why it matters: The extreme heat — making the Tokyo Games one of the hottest Olympics in decades — has made organizers reschedule matches and push events to the early morning hours or dusk to avoid the scorching sun, NBC reports.

  • Russian archer Svetlana Gomboeva lost consciousness during a competition likely due to heat stroke, AP reports.
  • At the beach volleyball arena, organizers have started hosing down the sand after competitors complained it was burning their feet, per NBC.

The big picture: Sultry weather conditions in Tokyo are not new, but due to climate change, the city's temperatures are increasingly hot.

  • Temperatures on Saturday climbed to nearly 34°C (93°F) across the greater Tokyo region, with humidity levels above 80%
  • Compared to 1964, the last time Japan hosted the Summer Olympics, the July and August temperatures in Tokyo are 2.7 degrees warmer, per NBC. There are also on average eight more days of 95-plus-degree weather than there were in 1964.
  • The International Olympic Committee and the Tokyo Games organizers released recommendations for athletes to prevent overheating.

Of note: Tropical Storm Nepartak, which formed Friday night over the western Pacific Ocean, may bring some heavy rain midweek, but also may stay north of Tokyo. The details of the storm are unclear at this point.

Go deeper

Sep 23, 2021 - Health

Team USA to mandate COVID vaccine for Winter Olympic hopefuls

The Emblem of Beijing 2022 Olympic Winter Games at Shijingshan district in Beijing. Photo: VCG/VCG via Getty Images

American athletes looking to compete in the Winter Olympics in Beijing must be fully vaccinated for COVID-19, according to updated guidelines posted on the U.S. Olympic and Paralympic Committee (USOPC) website.

Details: Employees, athletes and contractors must be vaccinated by Nov. 1 to use USOPC facilities or attend events hosted by the committee. On Dec. 1, the mandate extends "to all Team USA delegation members or hopefuls for future Games."

At least 3 dead after Amtrak train derails in Montana

Photo: Jacob Cordeiro/Twitter

An Amtrak train derailed near Joplin, Montana, resulting in at least three deaths and multiple injuries to passengers and crew on Saturday, per authorities and a company statement.

The big picture: 141 passengers and 16 crew members were estimated to be on the Empire Builder train, traveling from Chicago to Seattle and Portland, when eight of the 10 cars derailed about 4p.m., Amtrak said early Sunday.

Updated 7 hours ago - Politics & Policy

Federal judge blocks vaccine mandate for NYC teachers

Students are dismissed from the first day of school at PS 133 in Brooklyn on Sept. 13. Photo: Michael Nagle/Xinhua via Getty Images

A federal appeals court is set to hear a challenge Wednesday to a vaccine mandate planned for New York City school employees.

Why it matters The vaccine mandate was set to begin on Monday, prompting concerns over staffing shortages in schools across the nation's largest school system. But a judge on Friday temporarily blocked the measure, per AP.

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