Soaring Temperatures Drive Surge in Workplace Heat-Related Injuries

A new report by the Workers Compensation Research Institute (WCRI) reveals that worker injuries linked to excessive heat are spiking during high-temperature days, with injury claims increasing up to 18-fold when temperatures exceed 100 degrees. Even moderate heat—between 80 and 85 degrees—can double the risk of heat-related illnesses (HRIs), while days above 90 degrees push both HRIs and overall injury rates significantly higher.

The study, based on workers’ compensation data from 31 states between 2013 and 2022, shows a clear seasonal pattern, with 75% of HRIs occurring between June and August. Southern states such as Louisiana, Arkansas, Texas, Mississippi, and Arizona reported the highest rates, and all lack enforceable heat safety standards for employers.

Outdoor workers in physically demanding jobs are particularly vulnerable, especially those in construction, manufacturing, and transportation. New hires within their first two months on the job and younger male workers are also at elevated risk. Many heat-related injuries are likely underreported, as secondary effects—like falls or cognitive impairment—may be misclassified in claims data.

The report reinforces the urgent need for increased workplace awareness and preventive measures, particularly as climate change drives more frequent and intense heat waves. Employers, especially in heat-prone regions, are encouraged to proactively address heat risks even in the absence of regulatory mandates.