The Heat Workforce Standards Act would block the federal heat rule in congress, where OSHA has issued 0 final rules in 20 months

What the heat workforce standards act would actually do

A bill now moving through congress would decide whether the federal heat rule for workers ever takes effect, and it would decide that by blocking the rule, not creating one. The Heat Workforce Standards Act of 2026, Senate bill number S.4427, states its own purpose in its printed title, to prohibit the Secretary of Labor, the cabinet official who runs the United States Department of Labor, from finalizing, implementing or enforcing the heat injury and illness prevention standard the Occupational Safety and Health Administration, OSHA, the federal agency that inspects workplaces for safety hazards, proposed in August 2024. Reading the bill text itself makes this plain. Despite its name, the act does not set a new heat safety law. It stops one from ever taking effect.

Who introduced it and how support arrived

Senator Bill Cassidy, a Republican from Louisiana, introduced the bill on April 29, 2026. It has 12 cosponsors, all Republican senators, and it was referred to the Senate Committee on Health, Education, Labor and Pensions, where it remains, introduced but not yet voted out of committee. 8 cosponsors joined the day Cassidy introduced it, the official congressional tracking record shows. The other 4 signed on later, 2 in June, 1 in July and 1 in September, over the 5 months that followed.

Why its sponsors say they want it

The bill text lists 3 reasons. It calls the proposed OSHA standard overly prescriptive, burdensome to businesses and confusing to workers, naming high heat triggers, rest break protocols, acclimatization protocols and detailed written safety plans as the requirements it objects to. It also argues that 1 standard applied across every industry and region, without regard for local conditions, would cause confusion rather than protect anyone.

The Democrats' proposal puts workers at risk and threatens their livelihoods.

Senator Bill Cassidy, the sponsor of the bill, Republican of Louisiana. Source 3.

One-size-fits-all federal heating standards prevent small businesses and farmers from appropriately protecting the people they employ.

Senator Jim Risch, a cosponsor of the bill, Republican of Idaho. Source 3.

How long the rule it targets has waited

OSHA proposed the heat injury and illness prevention standard, the rule this bill would block, on August 30, 2024. It would cover indoor and outdoor work in general industry, construction, maritime and agriculture, everywhere OSHA has authority. The proposal has already been through a public comment period that closed January 14, 2025, a hearing that closed July 2, 2025, and a second, post hearing comment period that closed October 30, 2025. OSHA states no final rule has followed. Neither the bill nor OSHA states directly how long the rulemaking has run. Calculating from the dates each document gives, the wait stretches to about 20 months from the original proposal to the day Cassidy introduced his bill to stop it, and OSHA has issued 0 final rules in that time.

Where the fight stands

S.4427 has not been scheduled for a committee vote as of this file access date. A nearly identical bill in the House, H.R. 6213, has moved further, clearing the House Education and Workforce Committee 18 to 15 along party lines on July 22, 2026. That vote belongs to the House bill, not the Senate one. A coalition of labor unions and advocacy groups, citing the Bureau of Labor Statistics, says heat exposure killed 55 workers in 2023 and that heat deaths have more than doubled since 1999. Until congress or OSHA acts, no federal heat rule protects any worker, proposed or blocked.

That's the wrong direction when workers' lives are on the line.

The AFL CIO, a labor federation opposing the House bill that targets the same OSHA rule. Source 5.