By chance a cousin of Inia's, who was swimming his way to the church, saw her hair floating Mum survived being swept away by cyclone above the water line as she leaned her head backwards, and came to her rescue.
Speaking from his Masterton home this week, Inia said his cousin had "grabbed her" and battled his way to the church with the woman in tow.
The respite was short-lived as the cyclone soon turned its attention to the church, tearing off the roof and forcing its evacuation.
"Everyone had to run uphill to the chief's house which was up high and turned out to be the only safe place in the village," Inia said.
Mrs Katia was so traumatised by her brush with death she completely lost the power of speech for a full half-day, only later being able to tell her family she had survived on pure adrenalin.
"If my cousin Joji hadn't seen her she would definitely have died," Inia said.
He is flying to Fiji on Sunday, where he will spend a month in the village with his parents, grandparents and other family.
"I am going to take clothes, medicines, shoes and blankets and in Suva I will buy cooking materials to take to the island," he said.
"They have no electricity on the island, only generators, and cook on little kerosene burners.".
Koro Island is an eight-hour boat ride from mainland Fiji.
Inia, and his wife Jenna -- who is a teacher at Wairarapa College -- said the people of Wairarapa have already stepped up to help out.
Jenna's parents, Karen and Bernard Lett, Inia's Gladstone rugby club coach Steve Thompson and his wife Cath and a host of others had "been simply amazing" and a Givealittle donation page has been set up.
Inia, 27, works in the forestry industry and has lived in New Zealand for six years.
He has played 47 games for Wairarapa-Bush as a specialist halfback and will be back in Wairarapa from his Fiji trip in time to play club and representative rugby.