Tourists rest in front of a fountain in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

Tourists watch sunset at Infantry Memorial Monument Square in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

Tourists enjoy themselves at Infantry Memorial Monument Square in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

Tourists watch sunset at Infantry Memorial Monument Square in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

A man practices parkour at Infantry Memorial Monument Square in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

A man shelters from the sun with umbrella in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

Tourists rest in front of a fountain in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

A tourist views sunset at Infantry Memorial Monument Square in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

Tourists spend leisure time at Mont des Arts (Mountain of Art) in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

People rest on the grass at a park in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

Tourists take pictures at Infantry Memorial Monument Square in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

Pedestrians walk on a street in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

A woman rides on a street in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

Two women wait at a crossroad in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)

A delivery man rides on a street in Brussels, Belgium on June 25, 2019. A heatwave hit many parts of Western Europe this week, with temperatures rising over 40 degrees Celsius in some regions. (Xinhua/Zhang Cheng)