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Source: Asia Pacific Region 2 – Singapore

Air Quality

The 1-hr PM2.5 concentration readings over the next 24 hours are expected to range between Band II (Elevated) and Band III (High). The PSI for the next 24 hours is forecast to range between the high-end of the Moderate and the low end of the Unhealthy range, and may enter the mid-section of the Unhealthy range if denser haze is blown in.

Health Advisory

Given the air quality forecast for the next 24 hours, healthy persons should reduce prolonged or strenuous outdoor physical exertion. The elderly, pregnant women and children should minimise prolonged or strenuous outdoor physical exertion, while those with chronic lung or heart disease should avoid prolonged or strenuous outdoor physical exertion. Persons who are not feeling well, especially the elderly and children, and those with chronic heart or lung conditions, should seek medical attention.

Singapore, 14 September 2019 – There has been a deterioration in the haze conditions in Singapore this afternoon. This was due to a confluence of winds over the nearby region that led to more smoke haze from Sumatra being blown toward Singapore. For the rest of the day, hazy conditions are expected to persist and the prevailing winds are forecast to blow from the south-southeast or south-southwest. As at 5pm, the 24-hr PSI was 87-106, mostly in the Moderate and tipping into the Unhealthy range, and the 1-hr PM2.5 concentration readings were 77-133 µg/m3, in Band II (Elevated).

2         Dry weather persisted over central and southern Sumatra today. A total of 450 hotspots were detected mostly in the Riau, Jambi and South Sumatra provinces. This is a sharp increase from the 156 hotpots detected yesterday. Moderate to dense smoke haze from persistent hotspots in Riau and Jambi has been blown by the prevailing winds to affect Singapore and the southern parts of Peninsular Malaysia.

3         For the next few days, dry weather can be expected in Singapore and over central and southern Sumatra. The prevailing winds are expected to blow from the southeast or south. Singapore may continue to experience hazy conditions. For the next 24 hours, the 1-hr PM2.5 concentration readings are expected to range between Band II (Elevated) and Band III (High). The 24-hr PSI is forecast to range between the high-end of the Moderate and the low end of the Unhealthy range, and may enter the mid-section of the Unhealthy range if denser haze is blown in.

4          NEA is monitoring the situation closely and will provide further updates when necessary.

5        The health impact of haze is dependent on one’s health status, the PSI level, and the length and intensity of outdoor activity. When the PSI is in the Unhealthy range, reducing outdoor activities and physical exertion can help limit the ill effects from haze exposure. Given the air quality forecast for the next 24 hours, healthy persons should reduce prolonged or strenuous outdoor physical exertion. The elderly, pregnant women and children should minimise prolonged or strenuous outdoor physical exertion, while those with chronic lung or heart disease should avoid prolonged or strenuous outdoor physical exertion. Persons who are not feeling well, especially the elderly and children, and those with chronic heart or lung conditions, should seek medical attention.

6          Air quality indicators and health advisories during periods of transboundary haze refer primarily to the 24-hour PSI. There are no accompanying health advisories for any other air quality indicators. In addition, the main air pollutant during the haze season is PM2.5. Hence, the 1-hour PM2.5 concentration readings are a good indicator of the current air quality. Use this for immediate activities like going for a jog.

7          For updates, visit our NEA website (www.nea.gov.sg), MSS website (www.weather.gov.sg), the haze microsite (www.haze.gov.sg), mobile apps (myEnv and Weather@SG) or follow us on NEA Facebook (www.facebook.com/NEASingapore) and NEA Twitter (@NEAsg). For information on the distribution of hotspots detected over the past fortnight in the region, please refer to the ASEAN Specialised Meteorological Centre (ASMC) website at asmc.asean.org.

MIL OSI Asia Pacific News