H.R. 4443: Asunción Valdivia Heat Illness, Injury, and Fatality Prevention Act of 2025

H.R. 4443 tells the Labor Department to issue a workplace heat protection standard and makes clear that employers must keep workers safe from dangerous heat stress. In plain English, the bill tries to move heat protection from a patchwork of state rules and general safety duties to a specific federal standard with enforceable requirements.

The bill gives the Secretary of Labor broad authority to write a strong rule based on the best available science. It says worker protection should come first during the rulemaking process and allows the department to rely on heat rules already used in OSHA-approved state plans as proof that certain measures are practical. That matters because it could make it easier for federal regulators to defend a tougher national standard.

The measure points toward the kinds of protections the rule should include: engineering fixes like ventilation or cooling technology, changes to work schedules and procedures, employer-paid protective gear, training, emergency response steps, and written heat illness prevention plans developed with worker input. It also specifically calls for core protections such as cool drinking water, paid rest breaks, shade or cool-down areas, and acclimatization policies for workers adjusting to hot conditions.

The bill text provided appears incomplete, but its direction is clear: require OSHA to build a comprehensive heat safety framework that can be updated as science and technology change. If enacted, it would especially matter for outdoor workers and people in hot indoor settings like warehouses, kitchens, factories, and farms, while likely increasing compliance duties and costs for employers in heat-exposed industries.