The Occupational Health and Safety Act does not define maximum temperatures for any workplace. Under the General Duty Clause of the Occupational Health and Safety Act, the Ministry of Labour has developed guidelines to deal with heat stress and assist employers in meeting their obligations. MOL guidelines are intended for use in workplaces where heat stress can be brought on where high heat is generated through a process or where work is physically demanding. Heat stress can also be brought on by a combination of higher humidity and ambient temperatures.
Some individuals are more susceptible to heat stress including seniors and children less than 15 years of age. Heat stress can also be brought on from children wearing excessive heavy clothing and from playing sports or from prolonged physical exertion.
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