As the nation prepares to celebrate National Day in Kallang, the Government stands ready should haze conditions worsen, the National Environment Agency (NEA) said on Sunday (Aug 9).As of 1pm, the 24-hour Pollutant Standards Index (PSI) stood at 81, in the moderate range, in Singapore's Central region.Recent dry conditions have led to an escalation in hotspot activity, with hotspots and smoke plumes observed over parts of Sumatra and Kalimantan, NEA said.Under prevailing southeasterly winds, smoke haze could be transported towards Singapore, particularly from hotspots in southern Sumatra. Dry conditions are expected to persist over the coming week, increasing the risk of haze if the fires continue.Singapore's Haze Task Force (HTF), comprising 28 public agencies, is ready to take action should air quality deteriorate and the 24-hour PSI reading exceed 100, which would prompt NEA to issue daily haze advisories.The advisory will include the 24-hour PSI forecast, which will aid the public in planning their activities and events for the following day. Read more