Haze update Oct 7: 24-hour PSI forecast to be squarely in unhealthy range for the first time

For the first time since the National Environment Agency (NEA) began providing daily haze situation updates on Sept 4, Singapore's 24-hour Pollutant Standards Index (PSI) is forecast to be squarely in the unhealthy range. Over the last 33 editions, PSI forecast has either been in moderate range, or between moderate and unhealthy.On Wednesday (Oct 7), NEA said that moderate to dense smoke plumes from southern Sumatra were observed to drift towards Singapore, while moderate to dense smoke haze was also observed from hotspots detected in Kalimantan.In addition, the agency noted that dry conditions are expected to continue over the central and southern parts of Sumatra, as well as over many parts of Kalimantan."Under the prevailing south-easterly to southerly winds, smoke haze from these areas may continue to drift towards Singapore."The 24-hr PSI for Singapore is forecast to be in the unhealthy range."