OSHA Workplace Injury Research

Heat Stress at Work Is a Serious Medical Event

OSHA recorded 2,576 severe cases of heat-related illness, with environmental exposure accounting for 100% of all reported incidents.

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How often these injuries happen

OSHA recorded 2,576 severe cases of heat-related illness over the last decade. These incidents often manifest as systemic failure, where your body can no longer regulate its internal temperature, leading to immediate hospitalization.

Heat exhaustion and heat stress are not merely temporary discomforts but can lead to long-term cardiovascular strain and neurological complications. These injuries often result in significant time away from work and may permanently impact your ability to tolerate high-temperature environments in the future.

Reported Projected
010020030040020152026
Data: Federal OSHA Severe Injury Reports (29 states). 2025 and 2026 data forecasted by ClaimsBoost research team.

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What causes Heat and Light Injuries

Environmental heat exposure is the near-exclusive cause of these severe injuries, accounting for 100% of reported events. Most incidents occur when you are forced to perform strenuous labor in high-temperature conditions without adequate cooling breaks, hydration access, or shade, leading to rapid physical collapse.

1 Exposure to environmental heat
Incidents
2,566
Share
100% of reported incidents
2 Incidents onboard water vehicle in normal operation
Incidents
5
Share
0% of reported incidents
3 Forest fire or wildfire
Incidents
2
Share
0% of reported incidents
4 Nonroadway collision with other vehicle(s)
Incidents
1
Share
0% of reported incidents
5 Other fall to lower level
Incidents
1
Share
0% of reported incidents
6 Bitten or stung by animal
Incidents
1
Share
0% of reported incidents
Cause Incidents Share
1Exposure to environmental heat 2,566100% of reported incidents
2Incidents onboard water vehicle in normal operation 50% of reported incidents
3Forest fire or wildfire 20% of reported incidents
4Nonroadway collision with other vehicle(s) 10% of reported incidents
5Other fall to lower level 10% of reported incidents
6Bitten or stung by animal 10% of reported incidents

Where injuries happen most

Construction accounts for 23% of all severe heat-related cases, as you are frequently exposed to direct sunlight and high-heat environments without climate control. Similarly, transportation and warehousing workers face elevated risks due to the lack of ventilation in loading docks and delivery vehicles, which can quickly reach dangerous temperatures.

Construction 23%
Transportation & Warehousing 20%
Manufacturing 18%
Administrative Services 12%
Wholesale Trade 3%
Other 24%

Real cases like yours

These reports reveal a recurring pattern of you collapsing while performing manual labor in attics, on construction sites, or during outdoor delivery routes. The common thread is the failure of employers to implement mandatory rest cycles or provide sufficient water, and if your experience mirrors these preventable lapses, an attorney can help you review the specifics of your case.

Year State Industry Incident summary

Source: OSHA Severe Injury Reports. Narratives are verbatim from filings; identifying details may have been redacted by OSHA.

Frequently asked questions