Organisers of the Tokyo Olympics in 2020 plan to use the latest technology to help deal with any heat issues.
Temperatures reached a record 41.1 celsius in Japan on Monday, with the country experiencing a heatwave this summer. Tokyo's average July temperature is over 30c and safety measures being looked at include "mist-spraying" and "heat-blocking" technology.
More than 100km of road, including the routes for the marathon and walking events, could be sprayed with a product that reflects heat and ultraviolet rays to reduce temperatures. Moving the marathon start time to 7:00 local time is also under consideration.