Additional search and rescue teams will join the search on Friday morning.
Ward Line remains closed will investigations are carried out.
Police are urging people to not take matters into their own hands.
Officers received multiple calls about the noise from different suburbs of Masterton, a police spokesperson says.
Over 100 water pipe leaks are emptying the council's reservoirs at an alarming rate.
It comes one week after a couple's rescue from the Tararua Ranges in severe weather.
The pair were out tramping on Monday afternoon when the weather turned.
The woman is set to appear in the Masterton District Court on Wednesday.
"Every paddock was underwater."
