 Dangerous heat has become a crucial worker safety issue as the climate gets hotter, according to Max Schlobaum of the Maine AFL-CIO Union. Working people are outside, they're making their living, you know, doing construction, delivering mail, working in factories, working as farm workers, doing a whole host of jobs where when the temperature goes over 80 degrees or 90 degrees or 100 degrees, the work gets significantly more difficult and more dangerous.