A Ministerial Decision  announced on 26 May 2021 introduces a significant expansion of summertime working hours during which outdoor work is prohibited.
Under the new rules which come into force immediately, workers cannot work outside between 10:00 and 15:30 from 1 June to 15 September. This replaces legislation from 2007, that prohibited work in outdoor workspaces from 11:30 to 15:00, between 15 June and 31 August.

...... In 2019, the world’s largest study into heat stress  was carried out in Qatar, by ADLSA, the International Labour Organization (ILO) and the Supreme Committee for Delivery and Legacy. Throughout the summer of the same year, the FAME Lab from the University of Thessaly, Greece, a leading institution in this field, was commissioned to collect data on workers’ health and work intensity, covering more than 5,500 work hours.