In 1964, the Tokyo Olympics were held in October. There was a reason for that. It was hot then. It's hotter now.

Japanese summers are known for their oppressive and sometimes deadly mix of heat and humidity. In late July and early August the past two years, more than 1,000 people, including more than 150 in Tokyo, died of heat-related causes. Tens of thousands were hospitalised.

That kind of heat led Olympic organisers in 1964 to move the Summer Olympics to October. Those games began on October 10 55 years ago in Tokyo.

Next year, when the Summer Olympics return


Cooling a hot city

The IOC and NBC