Advisory on Haze Conditions in Singapore

As transboundary haze may affect air quality in Singapore from time to time, Fullerton Health Singapore shares this advisory to help our corporate clients and the wider community stay informed and take appropriate precautions.

Vulnerable groups, including children, older adults, pregnant women, and persons with chronic heart or lung conditions, should pay particular attention to the guidance below.

Understanding the Health Effects of Haze

Effects in the Short Term

Exposure to haze may cause:

Irritation of the eyes, nose, and throat
Coughing, runny nose, and breathing discomfort
Worsening of existing heart and lung conditions such as asthma, chronic obstructive pulmonary disease (COPD), and heart failure
Fatigue and reduced tolerance for physical activity

Effects can vary between individuals, and worsening of existing heart or lung conditions, in particular, may take time to become noticeable. Individuals with chronic conditions should monitor themselves closely during and after haze episodes and seek medical attention early if symptoms appear.

Effects Over Time

Haze episodes in Singapore are typically temporary and seasonal. Repeated or prolonged exposure to unhealthy air quality should still be minimised wherever possible.

Cumulative exposure to fine particulate matter (PM2.5) across multiple episodes can place additional strain on the heart and lungs, particularly for individuals already managing a chronic condition. Vulnerable groups experiencing recurring haze exposure through the year may wish to speak with their doctor about a health check.

Who Should Take Extra Precautions?

The following groups may be more sensitive to haze exposure:

Children and infants
Older adults
Pregnant women
Persons with asthma or chronic lung diseases
Persons with heart conditions

PSI Guide and Recommended Actions

PSI Range	Category	Recommended Action
0 to 50	Good	No special precautions needed
51 to 100	Moderate	Vulnerable groups should reduce prolonged outdoor exertion
101 to 200	Unhealthy	General public should cut down on prolonged outdoor activity. Vulnerable groups should minimise outdoor exertion and consider an N95 mask outdoors
201 to 300	Very Unhealthy	General public should avoid prolonged outdoor exertion. Vulnerable groups should avoid outdoor exposure and stay indoors
Above 300	Hazardous	Everyone should stay indoors and avoid outdoor exposure. Seek medical attention if symptoms occur

Figures are based on NEA’s published PSI bands. Refer to www.haze.gov.sg for live readings.

Recommended Precautionary Measures

Reduce Outdoor Activities

When air quality deteriorates:

Limit prolonged outdoor activities and exercise
Avoid strenuous physical exertion outdoors
Consider rescheduling outdoor activities to a later date
Stay indoors where possible, especially during periods of poor air quality

Keep Indoor Air Clean

Close windows and doors when haze levels are elevated
Use air conditioning in recirculation mode where available
Use air purifiers with HEPA filters to improve indoor air quality
Monitor indoor ventilation and air quality

Stay Hydrated

Drink adequate water throughout the day
Seek medical attention if symptoms persist or worsen

Use of Masks

When haze conditions become unhealthy and outdoor exposure cannot be avoided:

Wear a properly fitted N95 mask or equivalent particulate respirator
Surgical masks and cloth masks do not provide adequate protection against fine haze particles (PM2.5)
Individuals with heart or lung conditions who experience discomfort while wearing an N95 mask should consult a healthcare professional

When to Seek Medical Attention

Consult a healthcare professional if you experience:

Persistent cough
Shortness of breath
Wheezing
Chest discomfort
Severe eye irritation
Worsening asthma or other chronic medical conditions

Individuals with existing medical conditions should ensure they have an adequate supply of their prescribed medications during periods of haze.

Stay Updated, Stay Protected

We encourage everyone to monitor air quality and health advisories through official channels, and to pay attention to the hourly PSI forecast, PM2.5 readings, and any advisories issued by the authorities.

By taking sensible precautions and minimising exposure during periods of poor air quality, individuals can reduce the health impact of haze and help keep themselves and their families safe.

For the latest updates, visit:

If you or your family need to see a doctor, Fullerton Health Singapore’s Concierge App lets you locate the nearest clinic and access telemedicine consultations from home or the office.