Organisers of The Straits Times Run at the Hub 2015 will be monitoring the haze situation closely ahead of Sunday's scheduled run. The event will proceed only if it is safe for participants to do so, they said.
Singapore's PSI levels entered the very unhealthy range (201-300) yesterday, with similar conditions expected for much of today.
According to the National Environment Agency (NEA) website, healthy persons are advised to reduce any prolonged or strenuous outdoor physical exertion once PSI levels go past 100. Any physical exertion should be avoided when PSI levels are in the very unhealthy range.
Said ST Run at the Hub 2015 organising committee chairman Marc Lim: "As much as we are looking forward to a good event on Sunday, the safety and health of all participants is of paramount importance. We will carry on with the event only under acceptable conditions.
"As such, we will be hoping for clearer skies and waiting till Saturday night to make the final decision on the event. We appeal for everyone's patience and understanding."
Participants will be sent updates on the status of the event via SMS on Saturday. They can also get the latest information on the ST Run on ST's Facebook page or by following STcom on Twitter.
Said Straits Times editor Warren Fernandez: "We have been preparing for this event for months and would like to be able to proceed with it. But we will not do so at the risk of participants' health and safety."