Five years ago, Cyclone Nargis struck Burma's Irrawaddy Delta region, killing at least 140, 000 people and leaving three million in urgent need of assistance.

BBC: Rohingya boats sink off west Burma - many missing

The aid groups are using Mr Pun's boats and warehouses to channel food, shelter and medicine to stricken communities in the Irrawaddy delta, where at least 2.4m people are estimated to need help.

ECONOMIST: Big business to the rescue?

What I can tell you is that there are certainly concerns from the U.S. and the U.N. that the food that they're delivering is not getting outside fast enough from Yangon Airport to the Irrawaddy Delta.

NPR: Myanmar Still Barring Relief, Reporters

He says he has tried to travel down to the Irrawaddy River delta but was turned back by police, who want to control the situation there.

NPR: U.N. Obtains Visas for Myanmar, Reporter Says