Haze update for Sept 12: 24-hour PSI forecast to remain in moderate to low unhealthy range

Showers on Friday (Sept 11) afternoon and early Saturday morning have brought respite from both the haze and heat.

As of 6pm on Sept 12, the 24-hour Pollutant Standard Index (PSI) readings across all five regions in Singapore are in the moderate range.

Meanwhile, 1-hour PM2.5 readings are also in the normal range.

However, the country's 24-hour PSI forecast is still expected to be in the moderate to low unhealthy range.

Explaining this in its daily haze situation update on Saturday evening, NEA pointed out that moderate to dense smoke plumes continue to be observed from fires in southern Sumatra and Kalimantan.

It noted that showers are expected over northern Sumatra over the coming days, but dry conditions are forecast over central Sumatra and persist over Kalimantan and southern Sumatra.

This, coupled with the prevailing southerly or south-easterly winds, means there remains a risk of transboundary smoke haze affecting Singapore, should fires in Indonesia persist.

Members of the public are reminded that the health impact of haze is dependent on one's health status, the PSI level, and the length and intensity of outdoor activity.

Those who are planning to conduct or participate in outdoor activities immediately can check the 1-hour PM2.5 concentration readings and vulnerable persons guide.

Meanwhile, those who are planning outdoor activities for the next day should use the 24-hour PSI forecast and the corresponding health advisories for planning.

9月11日（星期五）下午和9月16日（星期六）清晨的阵雨缓解了雾霾和酷热。

截至9月12日下午6点，新加坡所有五个地区的24小时污染物标准指数（PSI）读数均处于中等水平。

同时，1 小时 PM2.5 读数也处于正常范围内。

然而，该国 24 小时 PSI 指数预测预计仍将处于中低不健康范围内。

国家环境局在周六晚间发布的每日雾霾情况通报中解释说，苏门答腊南部和加里曼丹的火灾持续产生中等至浓重的烟雾。

报告指出，未来几天苏门答腊北部将有阵雨，但苏门答腊中部预计天气干燥，加里曼丹和苏门答腊南部也将持续干燥。

再加上盛行的南风或东南风，这意味着如果印度尼西亚的火灾持续下去，跨境烟霾仍可能影响新加坡。

提醒公众，雾霾对健康的影响取决于个人的健康状况、PSI 值以及户外活动的持续时间和强度。

计划立即进行或参与户外活动的人员可以查看 1 小时 PM2.5 浓度读数和易感人群指南。

同时，计划第二天进行户外活动的人们应该参考 24 小时 PSI 预报和相应的健康建议进行规划。