Workplace heat exposure emerges as growing safety and liability risk

Extreme heat is emerging as a significant workplace hazard and a growing source of corporate liability. Research indicates that heat exposure contributes to approximately 28,000 workplace injuries annually in the United States. Unlike mechanical hazards, heat acts as an invisible stressor that can impair cognition, slow reaction times, and increase mental fatigue, indirectly triggering other accidents.

For industries relying on outdoor labor, such as construction, agriculture, and delivery, the risks are severe. In the U.S., the Postal Service was previously fined by OSHA following a heat-related death of a mail carrier. While the International Labour Organization has recognized the right to safe working environments as a core labor principle, federal protections remain limited in some regions.

Labor unions are increasingly using occupational heat as a strategic lever in organizing campaigns. By highlighting inadequate safety policies or implementation, unions aim to gain bargaining power and pressure corporations to adopt more robust heat-mitigation standards.