Construction workers at the new CHUM superhospital site in downtown Montreal walked off the job Wednesday morning to protest working conditions. Air quality tests conducted on June 7 came back normal, but it was recommended that further tests be carried out in warmer weather. The workers' union said it may conduct its own test to measure air quality during a heat wave. They returned to work about three hours later after officials gave them assurances that the hospital's air conditioning system would be running by next Monday. The hospital gave the workers permission to remove their safety vests as a temporary measure.

Source: CBC News July 06, 2016 14:30 UTC