Worker protections are needed for climate impacts
Heat exhaustion is a significant concern for workers, particularly as global temperatures rise and the frequency of heatwaves increases. This condition occurs when the body's cooling mechanisms are overwhelmed, leading to symptoms such as heavy sweating, weakness, dizziness, nausea, and even collapse. If left untreated, heat exhaustion can escalate to heat stroke, a potentially fatal condition.
Wet bulb globe temperature (WBGT) is a critical metric for assessing heat stress in outdoor and indoor work environments. Unlike the heat index, which only considers temperature and humidity, WBGT also accounts for wind speed, sun exposure, and radiant heat, providing a more comprehensive measure of heat stress on the human body. This makes it particularly useful for ensuring worker safety in hot conditions.
As temperatures continue to climb due to climate change, the risks associated with heat exposure in workplaces are becoming more pronounced. For example, the summer of 2023 was the hottest on record, leading to numerous heat-related deaths among workers, especially those in agriculture and construction. These sectors are particularly vulnerable due to the nature of the work and the fact that many workers are already at a higher risk due to socioeconomic factors.
To address these risks, there is a growing call for enhanced worker protections. One proposed measure is the Asunción Valdivia Heat Illness, Injury, and Fatality Prevention Act, which would mandate the Occupational Safety and Health Administration (OSHA) to establish standards for preventing heat-related illnesses. These standards would include measures such as mandatory water breaks, access to shade, and work rest cycles based on WBGT readings.
Additionally, there are efforts to implement an emergency temporary standard that would offer immediate protections. This includes requiring employers to provide adequate hydration, implement acclimatization programs for new workers, and ensure that appropriate engineering controls, such as ventilation and air conditioning, are in place.
Employers can also use tools like the OSHA-NIOSH Heat Safety Tool app, which provides real-time heat index and WBGT readings, along with safety recommendations tailored to the specific conditions at a worksite. This app is a valuable resource for planning work schedules and implementing heat safety measures.
As climate change continues to elevate temperatures, the need for robust worker protections against heat stress is critical. Legislative measures, along with practical tools and employer commitments, are essential to safeguard the health and safety of workers in increasingly hot environments.
