In the US, there are no federal rules related to heat exposure for workers—indoors or out. Farmworkers, who are excluded from national laws requiring overtime pay, as well as the right to collective bargaining, are particularly vulnerable. For decades, farmworker groups and labor activists have been lobbying the Department of Labor’s Occupational Health and Safety Administration (OSHA), which is responsible for workplace safety and worker rights, to develop rules for heat exposure. In 2021, the Asunción Valdivia Heat Illness and Fatality Prevention Act was introduced in the US House of
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