 Symptoms of such illness can range from headaches, confusion and muscle cramps to fainting, acute kidney injury and death. The Biden administration says the proposed regulations, which have been under consideration for nearly three years, would protect some 36 million workers nationwide if finalized. Over the last three years, regulators have been considering things such as what the heat stress thresholds for workers should be across industries, how to plan to acclimate new employees to heat exposure and other specifics.