Only eight cities outside of Western Europe would be viable places to host the 2085 Games, according to a model that the authors of the study were designed.
"high-profile international sporting events such as the Summer Olympics represent only a small fraction of the heavy external force," the article said.
"The increased restrictions on when, where, and how the Games can be held because of the extreme heat are a sign of a much bigger problem, "he added.
other cities in the world would face a greater chance of having to cancel outdoor events because of high temperatures.
"If you are going to spend billions of dollars to host an event, you'll want to have a level of certainty that you will have to cancel at the last minute, "said UC Berkeley Professor Kirk Smith, one of the authors of the study.
the study used data temperature and humidity to predict which cities would be most risky to host outdoor summer Games, using the marathon as a test case.
The endurance events would probably be the first victim of high temperatures - they need a lot of space, so they are usually held outside, and physical exertion
And the marathon is the mother. all endurance events.
The cities included in the study were in the Northern Hemisphere (home to 90% of the world population), below a mile above sea level (to avoid altitude sickness) and had a population of at least 600,000 people in 2012 (as the games are usually hosted by larger cities).
But the study also has implications for everyone.
"Climate change will force us to change our behavior to the way things have always been done," said Smith. "This includes sending your children to play football or go out for an outer jogging.
"If the world's elite athletes need to be protected against climate change," the article said, in conclusion, "that the rest of us?" World Cup
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