The heat is on: Outdoor workers should wear light clothes and a wide-brimed hat, and drink lots of water to prevent heatstroke.

The Labour Department calls on employers and workers to take precautions against heatstroke, amid a spell of hot weather in Hong Kong.

Acting Occupational Health Consultant Dr Wan Yuen-kong said workers are in danger of suffering heatstroke if they work in a hot and humid environment for long periods.

Heatstroke symptoms include thirst, fatigue, nausea and headache, which can lead to shortness of breath, rapid and weak pulse, dizziness, confusion, loss of consciousness and convulsions.

Keeping cool

To prevent heatstroke employers should:

* isolate heat-generating facilities in the workplace and use insulating materials to minimise heat dissipation;

* increase air flow by enhancing ventilation or installing air-conditioning;

* allow employees to take regular breaks or rotate to other worksites within the shift;

* arrange for employees to rest in a cool or shady place;

* provide adequate drinking water; and,

* provide information and training on heatstroke prevention and first aid.

Employees should:

* wear light cotton clothes;

* wear a wide-brimmed hat when working outdoors; and,

* drink water regularly.

Dr Wan said employers should be wary some workers may have difficulty adapting to a hot working environment due to their health condition. Employers should consider their doctor's recommendations when assigning work to them.

For more information on heatstroke click here.