A boy plays at the fountain on the Schwarzenberg Square in Vienna, Austria, on June 26, 2019. The highest temperature in Vienna reached 36 degrees Celsius on Wednesday. The current June is set to be the hottest in recorded history in Austria, with regional heat records also expected to be eclipsed in some parts of the country this week, according to the Central Institute for Meteorology and Geodynamics (ZAMG). (Xinhua/Guo Chen)