The first thing every employer needs to understand is that there is, without question, a legal duty to safeguard workers against the risks of heat stress. Seven provinces/territories (BC, NB, NL, PE, QC, SK and YT) include in their OHS regulations specific measures that employers must take to protect workers against heat stress. For example, Part 7 of the B.C. OHS Regulation requires employers to:

– Limit workers’ exposure to excessive heat;
– Conduct heat stress assessments to determine workers’ risks of hazardous exposure;
– Put into place a heat stress exposure control plan; and
– Implement engineering and administrative controls.http://www.hrsgroup.com/blog/heat-stress-the-law/