The "Extreme Temperature Worker Protection Act" aims to safeguard employees from health risks associated with extreme heat and cold in the workplace. The bill establishes definitions for key terms such as "acclimatization," "heat illness," and "cool-down area," and mandates that employers develop a written temperature-related injury and illness prevention plan (TRIIPP). This plan must include monitoring temperature metrics, providing access to drinking water, and allowing employees to take breaks in designated cool-down or warm-up areas.

Employers are required to closely monitor conditions and provide necessary resources, including personal protective equipment and adequate shade or warmth. They must also ensure that employees receive compensated breaks for acclimatization and recovery from temperature stress. Specifically, the legislation mandates that employers provide paid preventative warm-up breaks every two hours, access to heated indoor areas, and maintain vehicles with adequate heating systems.

Additionally, the bill requires employers to conduct quarterly training on temperature safety for supervisors and employees, covering risk factors, signs of heat and cold-related illnesses, and the proper use of personal protective equipment. Employers must also maintain records of temperature-related illnesses and fatalities that occur at the worksite.

The act prohibits retaliation against employees who report violations or participate in investigations related to the bill's provisions. The legislation is set to take effect upon passage.