This bill, known as the "Heat Workforce Standards Act of 2025," seeks to prevent the Department of Labor from enacting a specific workplace safety standard. It explicitly prohibits the Secretary of Labor from finalizing, implementing, or enforcing the proposed standard concerning heat injury and illness prevention in work settings. Specifically, this prohibition targets the "Heat Injury and Illness Prevention in Outdoor and Indoor Work Settings" standard, which was published by the Occupational Safety and Health Administration (OSHA) in the Federal Register on August 30, 2024. The legislation also extends this restriction to any substantially similar standard, effectively halting the establishment of new federal regulations regarding heat-related workplace safety.