23 Oct 2025
Effectively protecting workers exposed to heat
Understanding Heat Stress and Its Risks
Heat stress refers to the strain experienced by the body when exposed to high temperatures, sometimes combined with high humidity and intense physical effort.
Many sectors are affected: metallurgy, foundries, mining, laundries, large-scale catering, construction, agriculture, as well as any outdoor work during heatwaves.
The effects of heat are numerous: fatigue, excessive sweating, headaches, nausea, cramps, dizziness…
These symptoms, often underestimated, can signal serious conditions such as dehydration or heatstroke — a life-threatening emergency that can lead to loss of consciousness and, in 15 to 25% of cases, death (according to the INRS).
Beyond its physiological effects, heat reduces alertness, increases reaction times, and weakens fine motor skills, thereby increasing the risk of workplace accidents.
Aware of these challenges, public authorities are reinforcing regulations: in France, the decree of 27 May 2025 now requires employers to systematically assess risks associated with extreme heat episodes and to implement appropriate measures (work organisation, additional breaks, provision of drinking water, etc.).
PENTA Electrical Safety Products: Practical Solutions to Tackle Heat
At PENTA Electrical Safety Products, we believe that protecting workers is not just about meeting legal obligations — it’s about preserving their health, efficiency, and well-being.
Here are the best practices to help reduce heat stress:
- Adjust working hours: It is preferable to work during the coolest parts of the day.
- Increase the frequency of breaks and encourage hydration: According to the INRS, it is recommended to drink between 0.5 L/h and 1 L/h.
- Set up shaded or ventilated areas: Workplace adjustments should be made to ensure team safety.
- Provide suitable equipment to maintain comfort and reduce heat stress.
Our teams design and distribute innovative equipment to combat heat-related risks, developed to integrate seamlessly into the most demanding industrial environments.
These solutions do not replace organisational measures but complement them effectively by providing a direct response to thermal strain.
Focus on the CryoVest®: Technology Serving Safety
The CryoVest® thermoregulating vest is designed to effectively protect workers exposed to extreme temperatures (above 50 °C).
Tested and certified in real working conditions at ArcelorMittal, this vest has demonstrated its ability to reduce cardiovascular strain, delay dehydration, improve thermal comfort, and help maintain memory, attention, and coordination.
The CryoVest® thus becomes an essential solution for combating heat stress.
From a physiological perspective, the CryoVest® helps stabilise heart rate, limit sweating, and maintain consistent hydration levels in the body.
Its benefits are significant in terms of thermal comfort, recovery after exertion, and the preservation of cognitive functions — thereby reducing errors and exposure to heat-related accident risks.
Its use is simple: after freezing, the cooling packs are inserted into secure Velcro pockets.
The vest can be easily adjusted thanks to elastic straps.
Fully washable, it withstands numerous usage cycles, and the packs can be reused up to 60 times.
Want to learn more? Don’t hesitate to consult the CryoVest® product sheet.
