Heat-Related Worker Deaths Surge as Construction Industry Faces Mounting Crisis

Construction workers face a deadly and worsening heat crisis, with fatal heat-related injuries among all workers surging 77.4% from 2012 to 2023, according to new research analysis by The Center for Construction Research & Training (CPWR).

The construction industry recorded 18 heat-related deaths in 2023, representing more than one-third of all occupational heat fatalities nationwide despite comprising only 7% of the total workforce, according to the CPWR report. This disproportionate impact of heat hazards has intensified, with construction’s heat-related death rate reaching 0.15 per 100,000 full-time workers compared to just 0.04 across all other industries, the report said.

The seasonal pattern of fatalities reveals a predictable but deadly trend: summer months of June, July and August account for 71.4% of construction heat-related deaths, aligning with peak construction activity and highest temperatures. Geographic concentration follows similar patterns, with Texas leading at 25 deaths, followed by California with 13 and Florida with nine deaths from 2011 to 2023, the report said.

Interestingly, while fatal injuries have climbed dramatically, nonfatal heat-related injuries in construction dropped 57.2% from the 2011-2012 period to 2021-2022, falling from 1,500 to 620 cases, the report noted. This decline outpaced the 26.9% reduction of nonfatal heat-related injuries across all industries, suggesting either improved prevention of less severe incidents or potential underreporting issues within the construction sector, according to the report.

Industry Faces Unique Risk Amplification Challenges

Construction workers encounter a perfect storm of heat exposure risks that amplify beyond typical workplace hazards, according to the report. The combination of prolonged physical exertion, personal protective equipment requirements, and exposure to both outdoor temperatures and indoor heat sources creates compound risk factors absent in most other industries.

The data reveals significant underreporting concerns, with more than 5% of severe heat-related injuries identified only through narrative descriptions rather than standard injury classification codes. This suggests the true scope of heat-related incidents extends far beyond captured statistics, the report said.

Additionally, heat contributes to secondary injuries in construction, such as falls from scaffolding after workers become dizzy from heat exposure, creating indirect safety consequences that traditional tracking methods may miss.

Current surveillance systems likely undercount both acute incidents and chronic health impacts, as new research indicates chronic underhydration contributes to long-term diseases and premature mortality, the report said.

Prevention Resources and Regulatory Changes Drive Industry Response

The mounting crisis has triggered expanded prevention efforts and regulatory responses across multiple levels, according to the report. Seven states — California, Colorado, Maryland, Minnesota, Nevada, Oregon and Washington —now mandate heat protection requirements for workers, with additional states considering similar legislation. The American Society of Safety Professionals (ASSP) has published ANSI/ASSP A10.50-2024, which provides construction-specific heat stress management guidance.

Employers increasingly have access to technological solutions, including the OSHA-NIOSH Heat Safety Tool App and AIHA Heat Stress Mobile App, alongside comprehensive resources from CPWR and North America’s Building Trades Unions. These tools support implementation of pre-task heat stress hazard analyses, heat injury prevention plans, and worker training programs for recognizing heat illness symptoms, according to the CPWR report.

View the full report here. &