"We had to evacuate everyone from the six kaumatua flats but fortunately they were able to move back in three days later," he said.
The floods came just weeks after the excitement of Prince Harry's visit to the marae, and the Tamehanas said the Prince sent a message of concern when he heard about the disaster.
Support came from closer to home with assistance from the Tupoho Trust, the Whanganui City College student army, the Quaker Settlement and others.
"We really appreciate all the help that arrived and people kept coming back every day to lend a hand."
The marae would be closed for six months as the extent of damage to the buildings was assessed.
There was particular concern about damage to the historic wharenui when the wooden floor had to be removed.
The original rammed earth floor was exposed and Mr Tamehana said the primary colours of the tukutuku panels were revealed.
"It was like a time capsule under there, I was amazed at how vivid the colours were - the blue was a true indigo."
Having the marae out of action for six months meant no income, which put financial strain on the board.
"We still had all the same outgoings so it was stressful," said Mrs Tamehana.
They were able to re-open in time for the Waitangi Tribunal's report on the Whanganui land claim in October last year.
"We worked around the clock to get it ready and we've been getting a lot of bookings since."
The only damage that has not been repaired at Putiki are some cracks in the dining room floor.
The Tamehanas say they are thankful that nothing was lost to the floods although they are concerned about the probability of future events and how and the Ngatarua Stream might be managed to minimise flooding in future.