Air quality in Singapore is forecast to range from high-moderate to low-unhealthy over the next 24 hours. This comes after September 4th saw the first instance since 2023 of the Pollutant Standards Index (PSI) in Singapore entering the unhealthy range. The deterioration in air quality is attributed to haze conditions. Authorities are advising residents to monitor air quality updates and take necessary precautions. Vulnerable individuals, such as the elderly and those with pre-existing respiratory conditions, are particularly advised to limit outdoor activity. The situation is being closely monitored for further developments and potential health impacts across Singapore.