The 9 Emperor Gods are believed to dwell in the stars of the northern heaven under the reign of 'Thien Hou' - the Queen of heaven. They are believed to preside over life and death, blessings, peace and harmony on Earth. Thus in the 9 day celebration, it is a mix of celestial and terrestrial beings, as man worships the arrival of these deities on Earth.
It is also rumoured that in these 9 days, rain are expected as it is this means of 'water' that these deities make their way down from the Celestial Heavens. Which kind of explains why these few days, there were indeed dispersed showers!
But perhaps the highlight of the festival would be the piercings of some mediums, equivalent to Thaipusum, some of which looks ridiculously painful!
So for anyone interested to check out the festives, do head down to any of the void decks that you notice an elaborate tentage area set up with lots of incense burning, this festival will last 9 days and at the end of it you will see an entourage of neon lighted trucks and lion dance clanging as the devotees send these deities back to the Heavens on the last day.