By 2050 nearly half of previous Summer Olympic hosts could exceed safe temperatures
As the world heats up, nearly half of previous or future Summer Olympic host cities would risk going above a wet-bulb globe temperature of 82°F, the threshold the American College of Sports Medicine (ACSM) has set to cancel continuous physical activity.
Projected average wet-bulb globe temperature, July 20-August 11, 2050*
In the shade
In the sun
ACSM
cancellation threshold
Above threshold
82°F (27.7°C)
70
80
90
St. Louis
Beijing
Rio de Janeiro
Athens
Rome
Tokyo
Atlanta
Seoul
Barcelona
Brisbane
Sydney
Below threshold
70
80
90
Montreal
Melbourne
Los Angeles
London
Mexico City
Paris
Moscow
Berlin
Antwerp
Munich
Stockholm
Amsterdam
Helsinki
In the shade
In the sun
ACSM
cancellation threshold
Above threshold
82°F (27.7°C)
70
80
90
St. Louis
Beijing
Rio de Janeiro
Athens
Rome
Tokyo
Atlanta
Seoul
Barcelona
Brisbane
Sydney
Below threshold
70
80
90
Montreal
Melbourne
Los Angeles
London
Mexico City
Paris
Moscow
Berlin
Antwerp
Munich
Stockholm
Amsterdam
Helsinki
ACSM
cancellation threshold
In the shade
In the sun
82°F (27.7°C)
Above threshold
65
70
75
80
85
90
St. Louis
Beijing
Rio de Janeiro
Athens
Rome
Tokyo
Atlanta
Seoul
Barcelona
Brisbane
Sydney
Below threshold
Below threshold
65
70
75
80
85
90
Montreal
Melbourne
Los Angeles
London
Mexico City
Paris
Moscow
Berlin
Antwerp
Munich
Stockholm
Amsterdam
Helsinki
