People cool off near a water spray on Schwarzenbergplatz in Vienna, Austria, on July 28, 2020. The highest temperature in Vienna reached 37.2 degrees Celsius on Tuesday. (Xinhua/Guo Chen)

A girl cools off near a water spray on Schwarzenbergplatz in Vienna, Austria, on July 28, 2020. The highest temperature in Vienna reached 37.2 degrees Celsius on Tuesday. (Xinhua/Guo Chen)

A cyclist passes a water spray on Schwarzenbergplatz in Vienna, Austria, on July 28, 2020. The highest temperature in Vienna reached 37.2 degrees Celsius on Tuesday. (Xinhua/Guo Chen)

Children cool off near a water spray on Schwarzenbergplatz in Vienna, Austria, on July 28, 2020. The highest temperature in Vienna reached 37.2 degrees Celsius on Tuesday. (Xinhua/Guo Chen)

A cyclist passes a water spray on Schwarzenbergplatz in Vienna, Austria, on July 28, 2020. The highest temperature in Vienna reached 37.2 degrees Celsius on Tuesday. (Xinhua/Guo Chen)

A child cools off near a water spray on Schwarzenbergplatz in Vienna, Austria, on July 28, 2020. The highest temperature in Vienna reached 37.2 degrees Celsius on Tuesday. (Xinhua/Guo Chen)

Children cool off near a water spray on Schwarzenbergplatz in Vienna, Austria, on July 28, 2020. The highest temperature in Vienna reached 37.2 degrees Celsius on Tuesday. (Xinhua/Guo Chen)

Children cool off near a water spray on Schwarzenbergplatz in Vienna, Austria, on July 28, 2020. The highest temperature in Vienna reached 37.2 degrees Celsius on Tuesday. (Xinhua/Guo Chen)

A cyclist passes a water spray on Schwarzenbergplatz in Vienna, Austria, on July 28, 2020. The highest temperature in Vienna reached 37.2 degrees Celsius on Tuesday. (Xinhua/Guo Chen)