Summary: People working outdoors are among the most likely to suffer the consequences during heat waves. President Biden announced the Department of Labor will develop an alert to signal to employers and employees when heat is dangerous. Florida is one state that requires no protections for outdoor workers, but one county is hoping to change that. William Brangham discussed more with Nikolas Rivero. PBS NewsHour is supported by - https://www.pbs.org/newshour/about/funders
