A large section of an open field on Jurong Island was ablaze after a vegetation fire spread on Tuesday afternoon.
A video sent to online portal Stomp showed raging flames rising from the ground, with the surrounding area shrouded in thick smoke.
The Singapore Civil Defence Force (SCDF) said it was alerted to the fire in Meranti Avenue at 2.40pm.
Officers found "intermittent pockets of vegetation" on fire in an area measuring about four football fields in size, it said. The fire was extinguished by the SCDF and there were no reported injuries.
The cause of the fire is being investigated.
Last year, there were 368 vegetation fires, a 9 per cent decrease from the 405 cases seen in 2016, according to latest SCDF figures.
However, vegetation fires remain the most common type of fire in non-building premises, ahead of vehicle fires and rubbish fires in open spaces.