Singapore Grand Prix chiefs insist that there are no plans to amend or cancel this weekend's Formula 1 schedule, despite the local haze situation.
Pollution levels in Singapore were recorded at 130-161 PSI for the previous 24-hour period on Tuesday evening, which is the lower end of the 'unhealthy' region.
Some local sporting events have already been called off, but in a statement issued by the grand prix organisers on Tuesday it was made clear that there were no intention of altering the F1 schedule.
"Based on the current PSI levels, there are no plans to amend the published racing and entertainment programme," said the statement.
"The haze situation is highly changeable not only from day to day, but from hour to hour. Therefore, it is currently not possible to reliably predict what the PSI level might be over the race weekend.
"We will continue to work closely with all the relevant government authorities to receive the best possible forecasts when they are available."
Race organisers have vowed to keep the public up to date with the latest pollution readings, with information being displayed on the track's website as well as on giant screens at the track.
Face masks will also be made available to all spectators.