Summer has arrived, bringing record-breaking heat to parts of North America. It's time to remember that outdoor work in the summer sun can lead to heat illness, as can indoor work in spaces that aren’t sufficiently insulated or cooled.
In the United States, the federal Occupational Safety and Health Administration (OSHA) and most state OSH programs provide guidance to employers and their workers. California's Division of Occupational Safety and Health (Cal/OSHA) administers detailed regulatory requirements for outdoor first promulgated in 2005, and Washington has enforced state-level rules since 2007. Canadian occupational health and safety agencies also recognize “thermal stress” as a workplace hazard, with attention to both heat and cold. California has been working on standards for indoor workplaces since 2017.
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