LD reminds employers and employees to take heat stroke preventive measures in times of Heat Stress at Work Warning
As the Heat Stress at Work Warning is now in effect, the Labour Department (LD) reminds employers and employees to take appropriate measures during the effective period of the warning to prevent heat stroke when working in hot weather or hot environments.
Employees who work outdoors or in non-air-conditioned indoor environments face high levels of heat stress and are at a relatively higher risk of heat stroke. Employers should assess the risk factors of heat stress for employees at work and, based on the identified risk factors, take necessary preventive and control measures, including rescheduling work periods, setting up shading covers, providing ventilation and heat dissipation equipment, and reminding employees to replenish water and rest in a timely manner.
The Heat Stress at Work Warning is formulated by the LD based on the Hong Kong Heat Index. There are three levels of the warning: Amber, Red and Black, which help employers and employees better understand the level of heat stress while working outdoors or indoors without air-conditioning systems.
A spokesman for the LD said that when the department issues the Heat Stress at Work Warning, employers must refer to the criteria and recommendations provided in the "Guidance Notes on Prevention of Heat Stroke at Work" to conduct risk assessments, according to the workloads and other relevant heat stress risk factors, for employees who work outdoors or in non-air-conditioned indoor workplaces. Appropriate rest breaks should be arranged every hour, as far as reasonably practicable, based on various levels of the Heat Stress at Work Warning, to reduce employees' risk of heat stroke.
Employees must also follow instructions to rest on time. Whenever there are any symptoms of heat-related illnesses, such as headache, dizziness, thirst, and nausea, they should rest in a cool and shady place, drink water, and inform employers/supervisors to take appropriate action immediately.
The LD issued the "Guidance Notes on Prevention of Heat Stroke at Work", detailing the various risk factors that should be considered when conducting heat stress risk assessments and recommending corresponding control measures for identified risk factors for employers' and employees' reference. For the Heat Stress at Work Warning and related guidelines, please refer to the department's thematic webpage: www.labour.gov.hk/eng/news/prevention_of_heat_stroke_at_work.htm.
Source: AI-generated images
Update on cases of Legionnaires' disease
The Centre for Health Protection (CHP) of the Department of Health today (September 9) reported the latest number of cases of Legionnaires' disease (LD), and stressed the importance of using and maintaining properly designed man-made water systems, adding that susceptible groups should strictly observe relevant precautions.
From September 1 to 7, the CHP recorded three community-acquired LD cases and one imported LD case:
A male patient, aged 54 with underlying illnesses, who lives in Kowloon City District;
A female patient, aged 45 with good past health, who had been to Thailand during the incubation period and was classified as an imported case;
A male patient, aged 71 with underlying illnesses, who lives in Tuen Mun District; and
A male patient, aged 75 with underlying illnesses, who lives in Southern District.
"Epidemiological investigations are ongoing to identify potential sources of infection, high-risk exposure and clusters, if any," a spokesman for the CHP said.
As of September 7, 78 LD cases had been recorded this year. In 2023 and 2022, there were 121 and 80 cases respectively.
"Men, people aged over 50, smokers, alcoholics and persons with weakened immunity are more susceptible to LD. Some situations may also increase the risk of infection, including poor maintenance of water systems; living in areas with old water systems, cooling towers or fountains; using electric water heaters, whirlpools and spas or hot water spring spas; and recent stays in hotels or vessels," the spokesman said.
Legionellae are found in various environmental settings and grow well in warm water (20 to 45 degrees Celsius). They can be found in aqueous environments such as water tanks, hot and cold water systems, cooling towers, whirlpools and spas, water fountains and home apparatus that support breathing. People may become infected when they breathe in contaminated droplets (aerosols) and mist generated by artificial water systems, or when handling garden soil, compost and potting mixes.
Immunocompromised persons should:
Use sterile or boiled water for drinking, tooth brushing and mouth rinsing;
Avoid using humidifiers, or other mist- or aerosol-generating devices; and
If using humidifiers, or other mist- or aerosol-generating devices, fill the water tank with only sterile or cooled freshly boiled water, and not water directly from the tap. Also, clean and maintain humidifiers/devices regularly according to manufacturers' instructions. Never leave stagnant water in a humidifier/device. Empty the water tank, wipe all surfaces dry, and change the water daily.
The public should observe the health advice below:
Observe personal hygiene;
Do not smoke and avoid alcohol consumption;
Strainers in water taps and shower heads should be inspected, cleaned, descaled and disinfected regularly or at a frequency recommended by the manufacturer;
If a fresh-water plumbing system is properly maintained, it is not necessary to install domestic water filters. Use of water filters is not encouraged as clogging occurs easily, which can promote growth of micro-organisms. In case water filters are used, the pore size should be 0.2 micrometres (µm) and the filter needs to be changed periodically according to the manufacturer's recommendations;
Drain and clean water tanks of buildings at least quarterly;
Drain or purge for at least one minute infrequently used water outlets (e.g. water taps, shower heads and hot water outlets) and stagnant points of the pipework weekly or before use;
Seek and follow doctors' professional advice regarding the use and maintenance of home respiratory devices and use only sterile water (not distilled or tap water) to clean and fill the reservoir. Clean and maintain the device regularly according to the manufacturer's instructions. After cleaning/disinfection, rinse the device with sterile water, cooled freshly boiled water or water filtered with 0.2 µm filters. Never leave stagnant water in the device. Empty the water tank, keep all surfaces dry, and change the water daily; and
When handling garden soil, compost and potting mixes:
Wear gloves and a face mask;
Water gardens and compost gently using low pressure;
Open composted potting mixes slowly and make sure the opening is directed away from the face;
Wet the soil to reduce dust when potting plants; and
Avoid working in poorly ventilated places such as enclosed greenhouses.
The public may visit the CHP'sLD page, theCode of Practice for Prevention of LDand theHousekeeping Guidelines for Cold and Hot Water Systems for Building Managementof the Prevention of LD Committee, and the CHP'srisk-based strategyfor prevention and control of LD.
Source: AI-generated images
