Advisory: Working in heat

July 18, 2023

St. John’s, NL – WorkplaceNL is reminding the public to take extra precautions when working indoors or outside, as temperatures in many parts of the province are expected to be around 30 degrees Celsius, with Humidex values ranging from the high thirties to low forties. These hot and humid conditions increase the risk of heat stress, especially for those who work in commercial kitchens, laundries, bakeries, construction and farming.

Early warning signs of heat stress may include headache, nausea, dizziness, weakness, irritability, thirst and heavy sweating. If symptoms occur, move the person to a cool or shaded area to rest and provide water. If symptoms do not rapidly improve, seek medical attention.

Use these safe work practices to significantly reduce the risk of heat stress:

  • Use fans or air conditioning
  • Wear lightweight, light-coloured, loose-fitting clothes
  • Take more frequent rest breaks
  • Stay hydrated before, during and after work
  • Drink cool beverages, with no caffeine or alcohol (one cup of water every 30 minutes is recommended)
  • Use sunscreen and wear a wide-brimmed hat when working in the sun
  • Minimize physically-demanding activities during peak temperature periods
  • Create shade with screens or umbrellas

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Learn more

Safety Share: Heat Stress

Health Hazard Facts: Heat Stress

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About WorkplaceNL

Serving approximately 215,000 workers and 17,500 employers, WorkplaceNL administers an employer-funded, no-fault workers’ compensation system that promotes safe and healthy workplaces, provides return-to-work programs and offers compensation to injured workers and their dependents.

Media contact:

Carla Riggs, Director of Communications

709.778.1590 or


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