2pm PSI dips to 78

The 3-hour PSI reading fell to 78 at 2pm. The PSI reading was 80 at 1pm.

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A PSI reading of 101 to 200 means air quality is in the "unhealthy" range and 201 to 300 means "very unhealthy".

Anything above that means "hazardous".

Health advisory

Based on the 24-hour PSI readings, the Ministry of Health (MOH) advises that Singaporeans limit prolonged or heavy outdoor activities.

In particular, children, the elderly, and those with heart or lung diseases, should avoid outdoor activities and seek medical treatment early if they feel unwell.

MOH has activated the hospitals to prepare for the anticipated increase in the number of cases of asthma, bronchitis and conjunctivitis.

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