As the nation grapples with rising temperatures, longer heatwaves and ongoing debates over workplace heat safety, a new study from the Workers Compensation Research Institute (WCRI) highlights California’s leadership in protecting workers from extreme heat. The study, Impact of California’s Heat Standard on Workers’ Compensation Outcomes, found that California’s heat standard has led to measurable reductions in workplace injuries on hot days.
The study focused on industries with substantial exposure to outdoor heat, including construction, agriculture, and transportation, and examined the effect of the state’s regulations requiring employers to provide water, shade, rest breaks, acclimatization plans, and emergency response protocols during excessive heat events. The research found that since implementation of California’s heat standard, work-related injuries on hot days declined by 15% to 17% in construction, 24% to 27% in agriculture, and 19% to 25% in transportation. The data, which spans from before 2005 through 2024, shows considerable evidence of how the regulations led to reduced injury rates during extreme heat. It also reinforces the importance of California’s early action in developing one of the nation’s first comprehensive heat standards and offers a model for other states and the federal Occupational Safety and Health Administration (OSHA) as they move to adopt similar protections.
Despite the clear policy success of California’s heat standard, enforcement remains a persistent challenge. A recent state audit revealed that Cal/OSHA lacks the resources to effectively monitor the tens of thousands of agricultural worksites across the state, leaving too many violations unseen and unreported. To help close this gap the Legislature passed AB 1336, which is now awaiting the Governor’s signature. Under AB 1336, if a farmworker suffers heat-related injury, illness, or death and it is proven that their employer did not provide water, shade, and paid breaks as required by law, then that worker’s heat-related injury would be presumed to have been caused at work. By signing the bill, Governor Newsom can strengthen accountability and help ensure the state’s heat protections are meaningfully enforced, particularly for farmworkers who continue to face disproportionate risks from extreme temperatures.
While the study underscores the critical link between preventive regulations and reduced claims for heat-related injuries, the pending legislation (AB 1336) serves as a reminder that worker protections are stronger when they are fully enforced. As heat illness and injures continue to emerge as key workplace safety issue nationwide, California applicants’ attorneys play a vital role not only in securing fair compensation and benefits for those affected but also in supporting the broader effort to ensure every worker in the U.S. can do their job safely.
