AdvertisementHeat is killing workers in the U.S. — and there are no federal rules to protect themAugust 17, 2021Robert BenincasaCheryl W. ThompsonfacebookEmailCruz Urias Beltran collapsed because of heat-related illness while working in a cornfield near Grand Island, Neb., in 2018. He is one of at least 384 workers who died from environmental heat exposure in the U.S. in the last decade, according to an investigation by Columbia Journalism Investigations and NPR. (Walker Pickering for NPR)