The Pollutant Standards Index (PSI) hit an all-time high of 321 at 10pm on Wednesday, crossing into the "hazardous" range, according to data from the National Environment Agency (NEA).
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PM Lee, ministers up pressure on Indonesia to tackle haze
Prime Minister Lee Hsien Loong and several Cabinet members have increased the pressure on Indonesia to take control of the haze situation.
Singapore to press Indonesia to ‘do the right thing’ amid haze alarm
As the haze in Singapore reached hazardous levels for the first time ever, its government moved to assure the people that necessary efforts would be undertaken to alleviate the situation.