According to National Environment Agency (NEA) official website, the 1-hour PM2.5 level in the west of Singapore on Oct. 19, 2015, at 10pm is 442:
The 1-hour PM2.5 level in the South of Singapore is equally poor at 299.
If the 1-hour PM2.5 level in the West continues for 23 more hours, it will be viewed as "Hazardous".
According to the realistic PSI reading, it is 461:
The television stations took a while longer to compute the 3 hr PSI.
In fact, they left it blank for at least 15 minutes:
They finally updated the 3 hour PSI at 2315 Hrs:
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