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CNRS GUIDELINES IN THE EVENT OF A HEAT WAVE
Published on June 23, 2026 – Updated on June 23, 2026
from June 23, 2026 to August 31, 2026
What to Do During a Heat Wave
In the summer, heat waves are particularly likely to lead to heatstroke, and several factors can contribute to this.
Environmental Factors :
Work-related factors :
Heatwave instructions
Environmental Factors :
- Intense sunlight,
- High ambient temperature (including at night),
- High humidity,
- Poor air circulation or circulation of very hot air,
- Air pollution…
Work-related factors :
- Working in offices and spaces located in buildings with high thermal inertia,
- Demanding physical work (heavy lifting and/or very rapid movements),
- Insufficient rest breaks,
- Wearing work clothes that prevent sweat from evaporating,
- Heat generated by machinery, products, and work processes (foundries, bakeries, dry cleaners, food processing, etc.),
- Use of chemicals in confined spaces (solvents, paints, etc.).
In particular, we would like to remind you of the importance of :
- Stay hydrated regularly;
- Limit physical exertion and heavy lifting as much as possible during the hottest hours of the day;
- Adjust your work pace to your heat tolerance;
- Be alert to signs that may indicate heatstroke (headaches, dizziness, nausea, unusual fatigue, etc.);
- Whenever possible, choose the coolest work areas.
Heatwave instructions