California heat illness hits vulnerable workers hardest, study finds

A new KJT Law Group study says work-related heat illness sent 5,925 California workers to emergency departments from 2016 to 2023, with some counties seeing rates far above the state average. The report says Latino workers, indoor workers and people in high-exposure industries face disproportionate risk as extreme heat intensifies across the state.

Why it matters: - Work-related heat illness is no longer just a summer safety issue in California. The report says rising temperatures, longer heat seasons and heavy exposure in certain jobs are putting more workers at risk. - The burden is uneven. Counties with hotter climates and heat-heavy industries are seeing much higher emergency visit rates than the state overall. - Latino workers, younger workers and indoor workers are among the groups facing outsized risk.

What happened: - KJT Law Group published a study titled “Why California's Hottest Jobs Are Quietly Injuring the State's Most Vulnerable Workers.” - California recorded 5,925 emergency department visits for work-related heat illness between 2016 and 2023, based on state public health data. - The average annual rate was 4.3 visits per 100,000 workers statewide. - Imperial County recorded 33.5 occupational heat-related emergency visits per 100,000 workers. - Madera County recorded 22.3 per 100,000 workers. - Shasta County recorded 19.0 per 100,000 workers. - Kings County recorded 16.2 per 100,000 workers.

The details: - The report says farmworkers, construction crews, delivery drivers, warehouse employees, landscapers, manufacturing workers and kitchen staff can face heat plus physical exertion, sunlight, machinery, protective clothing and limited opportunities to cool down. - California's annual rate of reported occupational heat-related illness nearly doubled between 2000 and 2022, according to workers' compensation data tracked by the California Office of Environmental Health Hazard Assessment. - Early heat illness symptoms can include headache, nausea, weakness, dizziness, cramps and unusual fatigue. - Without intervention, heat illness can progress to confusion, loss of consciousness, organ damage, heat stroke and death. - New and returning employees face added risk because acclimatization takes time. - Imperial County's average annual occupational heat-related emergency department visit rate was about 7.8 times the California average between 2016 and 2023. - Imperial County combines extreme temperatures with agriculture, construction, transportation, utilities, landscaping and public works. - Public health data found occupational heat-related emergency department visits concentrated among male, Latino and younger workers. - Hispanic or Latino workers accounted for 51% of fatal workplace injuries in California in 2024, compared with 24% nationally. - Latino workers are heavily represented in agriculture, construction, landscaping, transportation and warehousing. - Indoor workplaces can also become dangerously hot because of machinery, ovens, industrial processes, poor airflow and retained heat. - California's dedicated indoor heat protections took effect on July 23, 2024. - The indoor standard generally applies when workplace temperatures reach 82°F while employees are present. - The indoor rule includes requirements for water, cool-down areas, training, emergency procedures, temperature assessment and heat controls under specified conditions.

Between the lines: - The state’s emergency department data likely undercounts the full burden because many workers are treated on-site, at home or without the case being recorded as work-related. - The report says 20% of workers reported no employer monitoring. - The report says 43% reported no known written heat plan. - Those findings suggest formal protections may exist on paper without reaching workers consistently in practice. - California's numbers also show how location and industry can combine to create far higher risk than statewide averages suggest.

What's next: - The report argues workplace protections need to keep pace with rising temperatures and changing exposure patterns. - Employers in outdoor and indoor high-heat jobs may face greater pressure to monitor workers, improve hydration and rest practices, and communicate heat plans clearly. - The state’s indoor heat standard may become more important as heat waves strain warehouses, kitchens, manufacturing facilities and distribution centers.

The bottom line: - California's heat problem is now a worker safety issue with sharp disparities by county, industry and ethnicity, and the danger is growing faster than many protections.