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26 July 2021

Five tips for managing hot weather hazards

Alex Minett looks at the challenges associated with working in hot weather and offers some tips for employers to mitigate the risks. 

1. Recognise the risks

There are both short-term and long-term risks associated with working in hot weather, particularly for outdoor workers. For example, sunburn can cause temporary discomfort while repeated exposure can lead to skin cancer. UV light can also affect both short-term and long-term vision.

Heat stress can include relatively minor issues such as heat cramp and heat rash along with more severe conditions such as heat exhaustion and heatstroke. The effects of heat exhaustion can be reversed when treated quickly but a blood temperature rise above 39.5°C can turn into heatstroke, which is a medical emergency.

Dehydration is also common and can lead to dizziness and confusion, which can affect a worker’s ability to do their job safely.

Training, including first aid training and toolbox talks can help to ensure workers are able to recognise and respond to signs of heat-related conditions in themselves and others.

2. Identify anyone at increased risk

Hot weather poses a risk to everyone, but some people are more susceptible to its damaging effects than others. For employees working outdoors, fair skin, freckles, a large number of moles and a history of skin cancer are all additional risk factors.

When it comes to high temperatures, people with pre-existing illnesses such as a heart condition, those on some medications, and overweight individuals, pregnant women, and older workers will all potentially be more vulnerable to the adverse effects of heat. Check the HSE’s Heat Stress checklist to identify individual heat-related risk factors and if necessary refer to occupational health workers or clinical healthcare professionals for further advice.

3. Understand the legal requirements

Currently, the workplace regulations governing temperature only apply to indoor working, not outdoor. However, unions are increasingly campaigning to address this. This is no surprise given that the UK’s 10 warmest years on record have all occurred since 2002 and 2018 was the hottest year ever recorded.

During heatwaves or very hot weather spells, consider whether outdoor work can be cancelled, postponed or scheduled for cooler times of day.Alex Minett

Despite there currently being no upper temperature limit, all employers have a duty to protect the health & safety of the workforce under the Health & Safety at Work etc Act 1974. The risks of working in hot temperatures, or exposure to the sun, must also be assessed and controlled under the Management of Health & Safety at Work Regulations 1999, which cover specific obligations for heat.

Other regulations employers must comply with include the Personal Protective Equipment at Work Regulations 1992, which stipulate PPE must be suitable for the risks, the workers using it, and the working environment. Failure to address the risks associated with working in hot weather can also be harmful to productivity and worker morale.

4. Take steps to reduce the risks

It’s always best to start by eliminating or reducing a hazard. During heatwaves or very hot weather spells, consider whether outdoor work can be cancelled, postponed or scheduled for cooler times of day. Evaluate whether any physical work can be substituted for work using machinery. Where outdoor work offers little to no shade, consider installing temporary shade tents or awnings. 

5. Monitor & manage the risks

The HSE’s thermal comfort checklist is a useful tool to help with conducting risk assessments during hot weather. Technology that monitors physiological signs of overheating and heat stress via sensors in armbands and other wearable devices can also be useful.

There are also plenty of interventions that can help manage the risks. Provide drinking water and encourage workers to hydrate regularly and take frequent rest breaks in shady areas or air-conditioned facilities. If working in direct sunlight is necessary, provide high factor sunscreen for application on all areas of exposed skin.

Appropriate PPE such as hard hat neck shades or Legionnaires hats with a flap and brim to protect the ears and neck, long-sleeved, cool clothing and protective eyewear with UV filters as well as breathable safety footwear can all help workers stay comfortable and protected. Cooling vests that can be ice-cooled like ice packs and cooling bandanas, towels and wraps can also be helpful.

Alex Minett is the health and safety compliance lead at the Contractors Health and Safety Assessment Scheme (CHAS).

Source: Construction Manager

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