Summer in Ontario is typically hot and dry, which can cause heat stress for outdoor workers who work long hours. With Environment Canada predicting warmer-than-usual temperatures this summer in Ontario, it’s critical to take adequate measures to prevent heat stress. Heat stress is a seasonal hazard that can occur when the body's core temperature rises, causing severe dehydration that can be harmful if left untreated. We invite you to listen to a re-launch of Episode 60 of the IHSA Safety Podcast, which discusses heat stress, the different types of heat stress disorders, risks, symptoms, controls, and actions to take when experiencing symptoms.

The Heat Stress Calculator from the Occupational Health Clinics for Ontario Workers (OHCOW) is a calculator that provides three methods of calculation: Humidex-based Method, WBGT Estimate Method, and Detailed WBGT Method. It’s an efficient tool for assessing heat stress and to reference when working in extreme heat conditions.

IHSA offers a range of free resources on heat stress, such as safety talks, manuals, bulletins, and advisories.

Free Resources:

Episode 60—Heat Stress: Understanding the risks, symptoms, and controls

Heat Stress Calculator (OHCOW)

Heat Stress Resources (IHSA.ca)

Heat Stress Awareness Wheel Tool – OHCOW

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