Kowhai Park remains closed because of a sewage leak.
The leak into the playground area was discovered on Friday, and the entire park has been closed since then.
Wanganui District Council's deputy property manager Leighton Toy said heavy rain caused a blockage in a sewer pipe, which then caused a sewer manhole to pop.
A lake formed in the middle of the playground area, which was cordoned off by council workers on Friday afternoon.
Several trucks were sucking out the leakage.