Similarly, on 15 October, the PSI readings increased from 69 at 6 a.m. to 98 at 3 p.m. and 4 p.m.,[37] 3 points short of reaching the unhealthy range. This eased to 82 by midnight.[38] As winds remained southeasterly, haze from Kalimantan blew across the South China Sea to Singapore.[39]