WHO Calls for Urgent Action on Workplace Heat Stress Amid Rising Temperatures

In a landmark report, the WHO and World Meteorological Organization warn that climate change-driven heatwaves are increasingly jeopardizing worker health and productivity. With temperature spikes becoming the norm, countries must collaborate to create effective adaptation strategies for the workplace and education systems.

The World Health Organization (WHO) has issued a stark warning regarding the escalating risks posed by extreme heat in the workplace, particularly as climate change leads to more frequent and severe heatwaves. The emphasis is on the need for enhanced protections for millions of workers globally, as outlined in a comprehensive new report coordinated with the World Meteorological Organization (WMO). According to the report, the rise in heat stress not only poses significant health risks, such as increased chances of stroke, kidney failure, and dehydration but also hampers productivity.

Historically, this is the first report focusing on heat stress in the workplace since 1969, signaling a critical evolution in acknowledging the negative impacts of rising temperatures. WHO director for environment, climate, and health, Rüdiger Krech, describes the findings as a wake-up call, emphasizing that high workplace temperatures lead to dire health consequences. For instance, prolonged exposure to temperatures above 38°C can expose workforces to severe heat-related health issues.

Moreover, the report warns that heightened temperatures correlate with decreased productivity—showing a 2% decline for every additional degree Celsius beyond 20°C. This is particularly alarming, as the last decade has shown record heat, with 2024 predicted to be the hottest year on record. During the 2023 heatwave in Europe, reported workplace accidents rose substantially when temperatures soared above 30°C.

Countries are beginning to respond to these findings. For example, Italy has introduced a decree halting work during peak heat hours, while Switzerland has paused construction in certain cantons during extreme heat periods. Unions stress the need for construction companies to take accountability and prioritize worker safety over productivity at critical temperatures.

Additionally, the report highlights that extreme heat impacts not only working adults but also vulnerable populations such as the elderly, children, and individuals with chronic illnesses. As education systems contend with rising temperatures, teachers and school administrations are urged to explore better ventilation and climate control methods to ensure learning environments remain conducive.

In Germany, schools can declare “Hitzefrei” to dismiss students during high temperatures; however, given the frequency of such heat events today, the implementation has been nuanced. Recommendations from Krech suggest revisiting school uniforms to ensure they are suitable for hotter conditions, highlighting the multifaceted approach needed across various sectors.

While adaptation measures are crucial, they require investment and strategic spending, especially as many governments shift their focus to defense amidst climate crises. Krech warns that neglecting necessary changes could lead to more significant productivity losses due to health issues related to extreme heat. The WHO's report ultimately serves as a call for collective action, urging collaboration among governments, businesses, and communities to prepare for the ongoing realities of climate change.