Sarada Viswanathan, right, is holding on to hope that her partner Rishab Iyer, left, is still alive in Nepal. (Supplied)
A week after the catastrophic Nepal-Tibet flood, 23-year-old Sarada Viswanathan is refusing to give up on her partner Rishab Iyer, also 23, who is still missing.
"It's been genuinely just hell for us," she told 7.30.
Mr Iyer was travelling with his parents and brother in Nepal on a Hindu Indian pilgrimage.
They too have not been heard from since last Wednesday.
The Iyer family — son Rudhra, father Sreedharan, mother Lakshmi and son Rishab — was on a pilgrimage tour in Nepal. (Supplied)
"It's been really difficult just not having any answers and not knowing where they are, how they're doing, whether they need help, whether they're drinking water, whether they're eating. Are they injured?" she said.
Ms Viswanathan has set up a DIY search operation at her family home in north-west Sydney, scanning location tracking websites, clinging to any detail that might pinpoint the Australians.
Sarada Viswanathan and her friends search online for any signs of the Iyer family. (ABC News: Jerry Rickard)
"We all have them on Find My iPhone and Life360," she explained.
"The last location I have of Rishab is outside that hotel. The last location we have of his brother is slightly up onto the highway."
The Iyers were staying at the Royal Himalaya Hotel & Lodge, close to the river that flooded.
Rishab Iyer and Sarada Viswanathan have been friends since childhood. (Supplied)
"We're just hoping that they managed to climb somewhere and they managed to escape and that they just are in a remote region that's blocked off and they're not able to get in contact with anyone," Ms Viswanathan said.
Other relatives of the Iyer family are already on the ground in Nepal and have been feeding back any scintilla of information to Ms Viswanathan.
