Rising Heat: A Public Health Crisis for Workers in Canada and Beyond, Warns WHO

TORONTO – Climate change is a pressing issue affecting workers worldwide, and Canada is not immune. The World Health Organization (WHO) recently labeled heat driven by climate change as a “public health crisis” for outdoor workers, pointing out that those in construction, farming, and other demanding fields face increased risks of heat-related illnesses.

In a joint report with the World Meteorological Organization (WMO), the WHO highlighted that these risks extend beyond outdoor jobs. Workers in hot, humid indoor environments, especially in factories where machinery radiates heat, are also in jeopardy. Rüdiger Krech from the WHO emphasized, “The workers keeping our societies running are paying the highest price.” Vulnerable communities, lacking access to cooling resources and healthcare, feel the impact even more.

Some might think Canadian workers are less at risk than those in hotter regions. Glen Kenny, a research chair at the University of Ottawa, argues otherwise. He notes the drastic temperature swings in Canada. “Our bodies lose that heat adaptation during colder months,” he says. This makes workers vulnerable when the seasons change.

Experts stress that heat-related risks become critical when core body temperatures exceed 38°C. The report recommends creating heat-health plans for workers, including regular breaks and hydration. Adjusting work schedules to undertake demanding tasks during cooler periods is also beneficial.

Moreover, Kenny highlights that older workers or those with health issues may struggle more in the heat. Their bodies are less efficient at cooling down, which can lead to severe dehydration and strain on the heart and kidneys.

Poor cognitive function and increased injury rates are other major concerns. Dr. Melissa Lem from Vancouver points out that when workers are overheated, their ability to focus drops, leading to a higher chance of mistakes on the job. In the 2021 heat dome in British Columbia, she witnessed an alarming rise in heat-related illnesses, particularly affecting isolated elderly individuals and likely workers too.

A critical strategy mentioned in the report is implementing a “buddy system.” Workers should watch for signs of heat stress in each other. Symptoms like fatigue, dizziness, and thirst should not be ignored. If conditions worsen, immediate cooling and hydration are necessary.

This year, the WHO/WMO’s findings echo the urgent need to adapt to climate change effects on workers. It’s essential not just to react, but to address the root causes like greenhouse gas emissions. Reducing these emissions can help lower overall air pollution, protecting workers’ health in the long term.

In closing, as climate change reshapes our environments, both Canada and the world must commit to safeguarding worker health. By integrating smart strategies, we can build a safer working future.

This article incorporates insights from both WHO and academic experts. For further details, you can download the full WHO/WMO report [here](https://www.who.int/publications/i/item/9789240060927).

Nicole Ireland, The Canadian Press

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