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 :
  • 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