The UAE’s summer conditions can turn routine outdoor work into a serious occupational health risk. A construction worker carrying materials, a maintenance technician working on exposed equipment, or a landscaping team operating in direct sunlight may all face heat stress during a shift.
For HSE professionals, managing this risk involves more than reminding workers to drink water. Heat affects how work is scheduled, how physically demanding tasks are assigned, how supervisors monitor teams, and how emergency arrangements are prepared.
A suitable heat-stress plan considers the weather, humidity, workload, clothing and personal protective equipment (PPE), access to shade, rest opportunities and workers’ ability to recognise early symptoms. These factors should be reflected in the workplace risk assessment and daily supervision.
Why Heat Stress Needs Attention in UAE Workplaces
Heat stress occurs when the body struggles to maintain a safe internal temperature while exposed to hot conditions. The risk can increase when a worker performs strenuous physical activity, wears clothing or PPE that limits heat loss, or works in an area with high humidity and limited air movement.
Outdoor workers are particularly exposed, but heat-related risks are not limited to construction sites. They can also affect:
- Road maintenance and infrastructure teams
- Landscaping and agricultural workers
- Delivery and logistics personnel
- Facilities management and maintenance teams
- Workers in warehouses, workshops and industrial environments
- Employees working near hot machinery or processes
A worker may be exposed to heat even when the air temperature does not appear extreme. Humidity can reduce the body’s ability to cool itself through sweating, while direct sunlight and radiant heat from surfaces or equipment can add to the overall heat load.
This is why HSE planning should consider actual working conditions rather than relying only on the daily weather forecast.
Main Factors That Increase Heat-Stress Risk
Before deciding on controls, supervisors and safety officers need to understand what makes a particular task more hazardous.
1. High temperature and direct sunlight
Working under direct sunlight increases heat exposure. Surfaces such as concrete, asphalt, metal roofs and paved areas may also absorb and radiate heat.
For example, a road maintenance worker may experience heat from the surrounding air, direct sunlight and hot road surfaces at the same time.
2. Humidity and limited air movement
High humidity makes it harder for sweat to evaporate. Without sufficient air movement, the body may struggle to release heat effectively.
A shaded area is helpful, but it may not provide enough relief if it is poorly ventilated or remains excessively hot.
3. Physically demanding work
Heavy lifting, repetitive movement, digging, carrying materials and operating certain tools increase physical effort. The body produces additional heat during strenuous activity.
A task that appears manageable in cooler weather may become significantly more demanding during a UAE summer shift.
4. PPE and work clothing
Protective clothing is essential for controlling workplace hazards, but some equipment can increase heat retention.
Examples include:
- Coveralls and protective suits
- Respiratory protective equipment
- Heavy gloves
- Protective helmets
- Chemical-resistant clothing
Workers should never be instructed to remove required PPE simply to feel cooler. Instead, supervisors should review whether the equipment is suitable for the task, whether safer alternatives are available, and whether additional cooling and rest controls are needed.
5. Acclimatisation and individual circumstances
Workers who are new to hot environments, returning after an extended absence, or moving from indoor to outdoor duties may need time to adapt.
Acclimatisation is a gradual process. Supervisors should consider a worker’s recent exposure to heat when assigning tasks and arranging monitoring. A worker’s experience in a particular job does not automatically mean they are protected from heat illness.
How Heat Stress Changes HSE Planning
Heat-stress management should be included in the planning stage, before workers begin the task. A risk assessment should identify where exposure may occur, who could be affected, how serious the consequences could be and which controls are required.
The following areas deserve particular attention.
1. Review the risk assessment
A general outdoor-work risk assessment may not adequately address seasonal heat exposure.
Safety officers should review:
- Expected temperature and humidity
- Direct sunlight and radiant heat
- Duration of exposure
- Physical demands of the task
- Availability of shade and cooling
- Access to drinking water
- PPE requirements
- Worker experience and acclimatisation
- Emergency access and communication arrangements
The assessment should be reviewed when conditions change, such as a rise in temperature, a change in work location, increased workload or the introduction of additional protective clothing.
For a wider understanding of this process, refer to SFAST’s Risk Assessment Guide.
2. Schedule work around heat exposure
Work planning should reduce exposure during the hottest parts of the day wherever practicable.
For example, a construction supervisor may arrange heavy material handling for cooler morning hours and move suitable lighter or indoor tasks to hotter periods.
The schedule should also allow sufficient time for rest and recovery. A fixed work-rest ratio should not be assumed suitable for every workplace. The appropriate arrangement depends on environmental conditions, workload, PPE and the results of the risk assessment.
3. Plan suitable rest areas
Rest breaks are more useful when workers can recover in a cooler environment.
A suitable rest area should be:
- Shaded or air-conditioned where practicable
- Protected from direct sunlight
- Well ventilated
- Close enough to the work area for practical access
- Supplied with drinking water
A small shaded shelter beside a worksite may be more useful than a distant break room that workers cannot access easily during the task.
4. Make hydration practical
Water should be available close to where workers perform their duties. Requiring workers to walk a long distance to obtain drinking water can discourage regular hydration.
Workers should be encouraged to drink regularly rather than waiting until they feel thirsty. Employers should also consider the nature of the work, sweating and relevant occupational health advice when deciding whether additional electrolyte replacement is appropriate.
Avoid giving every worker an identical fluid target without considering individual circumstances and medical advice.
5. Prepare for changes in working conditions
Heat exposure can change during a shift. A task may take longer than expected, equipment may fail, or workers may need to remain in an exposed area while an issue is resolved.
Supervisors should know when work needs to be paused, reassessed or reorganised. Emergency work should not become an excuse to ignore heat exposure controls.
UAE Midday Break: What HSE Teams Need to Know
The UAE has an annual Occupational Heat Stress Prevention Policy, commonly known as the midday break.
For 2026, the policy applied from 15 June to 15 September, prohibiting work under direct sunlight and in open areas between 12:30 pm and 3:00 pm each day. The policy includes specific exemptions for certain activities that cannot be postponed for technical or public-safety reasons, subject to the applicable rules and conditions.
HSE teams should not treat the midday break as a complete heat-stress management programme. Heat exposure can remain a risk before and after the restricted hours, and indoor workplaces may also require controls.
Employers and supervisors should check the current Ministry of Human Resources and Emiratisation (MoHRE) requirements and any applicable local authority guidance before planning work. Exemptions should never be assumed simply because a task is difficult to reschedule.
The UAE Government’s health and safety at workplace guidance explains the annual midday break and the categories of work that may be exempt.
Practical Heat-Stress Controls for Supervisors
A heat-stress plan only works when its controls are implemented consistently. Supervisors have an important role because they can observe working conditions, identify changes and respond when workers show signs of heat-related illness.
| Control area | Practical supervisory action |
| Work scheduling | Arrange suitable tasks for cooler periods and review the day’s work plan |
| Rest arrangements | Ensure workers can access suitable shaded or cooled rest areas |
| Hydration | Check that sufficient drinking water is available close to the work area |
| Workload | Adjust strenuous activities when heat exposure increases |
| Acclimatisation | Pay attention to new workers and those returning after time away from hot conditions |
| PPE | Confirm protective equipment is suitable and that additional heat exposure is considered |
| Communication | Explain heat hazards, symptoms and reporting arrangements in a language workers understand |
| Monitoring | Observe workers for signs of heat illness and respond promptly |
| Emergency response | Ensure workers know how to raise an alarm and obtain medical assistance |
Use the Hierarchy of Controls
Heat-stress prevention should not depend entirely on worker behaviour. HSE teams should consider stronger controls before relying only on reminders, training or PPE.
For example:
- Elimination: Avoid or postpone unnecessary outdoor work during periods of severe heat exposure.
- Substitution: Where practicable, use equipment or methods that reduce physical effort and exposure.
- Engineering controls: Provide shaded shelters, cooling systems, ventilation and suitable mechanical assistance.
- Administrative controls: Arrange work-rest schedules, hydration access, acclimatisation, training and supervision.
- PPE: Select suitable protective equipment while considering its contribution to heat retention.
These measures should be selected according to the task and risk assessment. Read the Hierarchy of Controls Guide to understand how different control levels can be applied.
Recognising Heat-Related Illness
Workers and supervisors should be trained to recognise early warning signs. Heat illness can worsen if symptoms are ignored or a worker continues strenuous activity.
| Condition or warning signs | Possible indicators | Appropriate response |
| Heat cramps | Painful muscle cramps, often during or after physical activity | Stop strenuous work, move to a cooler area and seek appropriate first-aid advice |
| Heat exhaustion | Heavy sweating, weakness, headache, dizziness, nausea or faintness | Stop work, move the person to a cool place, begin cooling and obtain medical assessment |
| Possible heat stroke | Confusion, collapse, seizures, altered consciousness or very high body temperature | Treat as a medical emergency, call emergency services and begin rapid cooling while help is on the way |
Heat stroke is a life-threatening emergency. Do not wait for every possible symptom to appear. If a worker becomes confused, collapses or shows signs of altered consciousness in hot conditions, activate the emergency response immediately.
Supervisors should not send an unwell worker back to the task simply because they feel better after a short rest. Medical assessment and the workplace’s return-to-work arrangements should guide the next steps.
A Practical UAE Workplace Example
Consider a construction team installing external services at a site in Abu Dhabi during summer.
The original plan involves excavation, pipe handling and equipment installation throughout the shift. The supervisor identifies several heat-related concerns:
- Workers will perform strenuous manual tasks.
- Parts of the work area are exposed to direct sunlight.
- Some workers must wear protective clothing and gloves.
- The worksite has limited shaded space.
- The afternoon schedule may overlap with the UAE midday break.
The HSE team reviews the risk assessment and makes practical changes.
- Heavy manual work is scheduled for cooler hours where practicable.
- The daily programme accounts for the applicable midday break.
- Suitable shaded and cooled rest facilities are arranged.
- Drinking water is placed near the work area.
- Workers receive a briefing on heat-illness symptoms and reporting.
- Supervisors monitor workload, working conditions and signs of heat illness.
- Emergency communication and access arrangements are checked.
The important point is that heat stress influences the entire work plan, not just the break schedule. The HSE team considers the task, people, equipment, environment and emergency arrangements together.
What Should an HSE Officer Check During a Heat-Stress Inspection?
A site inspection should verify whether the planned controls are actually working.
An HSE officer can check:
- Is the heat-stress risk assessment suitable for the current task and conditions?
- Are work schedules consistent with applicable UAE requirements?
- Can workers access drinking water without unnecessary delays?
- Are rest areas shaded, accessible and sufficiently cool?
- Are new or returning workers being monitored appropriately?
- Are workers using the required PPE correctly?
- Do workers understand the symptoms of heat illness?
- Are supervisors responding when conditions become more demanding?
- Are first-aid arrangements and emergency communication available?
- Are heat-related concerns, incidents and corrective actions recorded?
Inspection findings should lead to action. For example, if workers repeatedly avoid a rest shelter because it is too far away, the solution may be to relocate the facility rather than simply reminding workers to use it.
Common Heat-Stress Planning Mistakes
Some workplaces have written heat-stress procedures but still struggle to manage exposure effectively.
Treating the midday break as the only control: Heat risks can exist outside restricted hours. Risk assessment, hydration, cooling, suitable work-rest arrangements and supervision remain important.
Using the same work-rest schedule for every task: Heavy physical work and lighter duties do not create the same heat load. Work-rest arrangements should reflect the actual conditions.
Providing water without making it accessible: Water that is stored far from the work area may not support regular hydration.
Ignoring new and returning workers: Workers who are not acclimatised may need additional consideration and gradual exposure.
Focusing only on temperature: Humidity, sunlight, air movement, workload and PPE can all influence heat stress.
Failing to act on early symptoms: A worker reporting dizziness or unusual weakness should be taken seriously. Continuing the task may increase the risk of a medical emergency.
Frequently Asked Questions
What is heat stress in HSE?
Heat stress is a condition in which the body struggles to maintain a safe internal temperature because of environmental heat and physical activity. It can lead to heat cramps, heat exhaustion and potentially life-threatening heat stroke.
When does the UAE midday break apply?
For 2026, the UAE’s annual midday break applied from 15 June to 15 September, between 12:30 pm and 3:00 pm. It restricts work under direct sunlight and in open areas, subject to specified exemptions. HSE teams should check the current official requirements each year.
Is the midday break enough to control heat stress?
No. It is one important part of heat-stress prevention, but workers may still face high temperatures outside the restricted hours or in indoor environments. Risk assessments, suitable work-rest arrangements, hydration, cooling and supervision are also necessary.
What should supervisors do if a worker shows signs of heat exhaustion?
Stop the worker’s activity, move them to a cooler place, begin appropriate cooling and obtain medical assessment. If there are signs of possible heat stroke, such as confusion, collapse or altered consciousness, call emergency services immediately and follow the site’s emergency procedure.
Why is acclimatisation important for outdoor workers?
Acclimatisation allows the body to adapt gradually to working in hot conditions. New workers and those returning after time away from heat exposure may be more vulnerable, so supervisors should consider gradual exposure and closer monitoring.
Build Practical HSE Knowledge with SFAST
Effective heat-stress management requires more than knowing the hazards. HSE professionals need to identify exposure, assess the risks, select suitable controls, communicate instructions and check whether those controls are working.
If you are developing your HSE knowledge or preparing for a safety-related role in the UAE, explore SFAST’s Safety Officer Career Path Guide. You can also speak with a SFAST course adviser to understand which NEBOSH or IOSH learning route may support your professional development.