On Saturday, temperatures in Tokyo reached 33°C, and the same is forecast for Sunday.
Olympic volunteers in Tokyo are wearing umbrella hats as they stand for hours in the scorching sun. The heat is aggravated by humid air.
The volunteers hand out scarves to people to weather the sun and give recommendations through the loudspeakers on how to avoid prevent heat strokes.
The 2020 Summer Olympics are running in the Japanese capital until 8 August.