新加坡：周六（10月3日），新加坡的空气质量有所改善，已恢复到“中等”水平。此前，该市中心地区的24小时污染物指数（PSI）曾一度超过“不健康”范围；当晚11点时，中心地区的24小时PSI为100，东部为93，南部为89，北部为76。
SINGAPORE: Air quality across Singapore improved to the moderate range on Saturday (Oct 3), hours after the 24-hour Pollutant Standards Index (PSI) in the central region crossed into the unhealthy range At 11pm the 24-hour PSI in the central region was 100. Readings were 93 in the east, 89 in the south and 76 in the north.
更能够反映当前空气质量状况的1小时PM2.5浓度数值在所有五个地区也都处于正常范围内。
The 1-hour PM2.5 readings, which provide a more current indication of air quality, were also in the normal band across all five regions.
周六早些时候，新加坡国家环境局（NEA）发布更新称，来自苏门答腊南部的浓烟正朝新加坡及周边地区扩散；同时，来自加里曼丹地区的火灾产生的烟雾也影响了当地空气质量。
In an update earlier on Saturday, the National Environment Agency (NEA) said moderate to dense smoke plumes from southern Sumatra were observed drifting towards Singapore and the surrounding region. Smoke haze from fires in Kalimantan was also observed..
预计周日新加坡及周边地区的天气将持续干燥，东南风或西南风将逐渐增强。
Dry weather is forecast to persist over Singapore and the surrounding region on Sunday, with prevailing southeasterly or southwesterly winds expected to strengthen.
新加坡国家环境局表示，烟雾仍有可能对当地居民的健康造成影响，预计24小时PSI指数将处于“高-中等”至“低-不健康”范围内。该机构建议：当24小时PSI指数处于“不健康”范围时，健康人群应减少长时间或高强度的户外活动；老年人、孕妇和儿童应尽量避免此类活动；患有慢性肺病或心脏病的人则应完全避免户外活动。
There remains a risk of smoke haze affecting Singapore, with the 24-hour PSI forecast to be in the high-moderate to low-unhealthy range, NEA said. The agency advised healthy people to reduce prolonged or strenuous outdoor physical exertion if the 24-hour PSI is in the unhealthy range. Elderly people, pregnant women and children should minimise prolonged or strenuous outdoor physical exertion, while people with chronic lung or heart disease should avoid such activity.
国家环境局指出，烟雾对健康的影响取决于个人的健康状况、PSI指数水平以及户外活动的持续时间和强度。对于即时的户外活动，人们应参考1小时PM2.5浓度数值及相关个人健康指南；而在规划第二天的户外活动时，则应参考24小时PSI指数及相应的健康建议。
NEA said the health impact of haze depends on a person's health status, the PSI level, and the length and intensity of outdoor activity. For immediate outdoor activities, people should refer to the 1-hour PM2.5 readings and corresponding personal guide, while the 24-hour PSI forecast and health advisories should be used when planning outdoor activities for the next day.
24小时PSI指数是新加坡用于衡量每日空气质量的指标，也是国家环境局发布每日健康建议的依据。该指数通过计算六种空气污染物——PM2.5、PM10、臭氧、二氧化硫、二氧化氮以及一氧化碳的含量得出，反映了过去24小时内的平均空气质量。
The 24-hour PSI is Singapore's indicator of daily air quality and forms the basis of NEA's daily health advisories. It is calculated using six air pollutants - PM2.5, PM10, ozone, sulphur dioxide, nitrogen dioxide and carbon monoxide - and reflects the average air quality of the past 24 hours.
而1小时PM2.5数值则是指该小时内PM2.5污染物浓度的平均值。PM2.5是指直径不超过2.5微米的细颗粒物，在导致健康危害的雾霾天气中，它是最主要的污染物。
The 1-hour PM2.5 reading, on the other hand, is the hourly average of the PM2.5 pollutant levels. PM2.5 is fine particulate matter with a diameter of 2.5 micrometres or shorter, and is the dominant pollutant during haze that causes harm to health.
当24小时PSI指数处于101至200区间时，空气质量被视为“不健康”；处于201至300区间则为“非常不健康”；若超过300则属于“有害”级别。
A 24-hour PSI reading is considered "unhealthy" when it is in the 101 to 200 range, "very unhealthy" when it is within the 201-300 range, and "hazardous" when it goes over 300.
至于1小时PM2.5数值，则被划分为四个等级：正常、偏高、高以及极高。数值在56至150之间属于“偏高”级别；151至250为“高”级别；超过250则被归为“极高”级别。
The hourly PM2.5 reading is classified in four bands: normal, elevated, high and very high. It is considered elevated when it ranges from 56 to 150. The "high" band ranges from 151 to 250, and readings above that are classified as "very high".