The National Environment Agency (NEA) has confirmed that the hail, which some residents, particularly those living in the western parts of Singapore experienced, is not caused by the cloud seeding in Indonesia.
It said in a briefing on Tuesday evening, that clouds do not travel that far and the clouds would be going in the wrong direction if it was related as the wind is currently blowing the haze away from Singapore.
Asked if the hail was related to the haze, NEA would only say that it was a possibility but could not give a confirmation. It added that the heavy downpour on Tuesday afternoon was not toxic.
Wednesday's forecast was still likely to be "unhealthy" even though the current PSI reading is in the "moderate" range. This is because the PM2.5 reading is in the "unhealthy" range. Emergency department attendance and polyclinic attendance for haze-related conditions have gone up 0.9 per cent and 16.5 per cent respectively, it said.