In hearings on a draft rule to prevent heat-related illness in millions of vulnerable U.S. workers, top health and safety experts explain why relying on employers to “do the right thing” costs lives.By Liza GrossJuanita Constible has analyzed state workplace heat standards across the United States for the Natural Resources Defense Council since 2018. But she first encountered heat stress as a wildlife biologist nearly 30 years ago, while spending long, hot days studying Canadian toads in a northeastern Alberta forest and nights sleeping in a stuffy tent. 

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