"We're planning four to five flights for both Saturday and Sunday and it is our hope that some of those shipments, again, will be handed over directly to international NGOs," he said.
Myanmar's government was organizing a trip of diplomats to the affected areas this weekend, McCormack added.
In a sign of the tensions between the generals and the international community, Myanmar's U.N. envoy accused France of sending a warship to his country. France's U.N. ambassador said the junta was on the verge of a "crime against humanity."
French envoy Jean-Maurice Ripert said the ship is operated by the French navy but is not a warship. It is carrying 1,500 tonnes of food and medicine as well as small boats, helicopters and field hospital platforms.
"We are still trying to convince the authority of Burma to authorize us to go there," Ripert said. "The ship will be off the coast of the delta, but in international waters, tomorrow. We still hope they will not refuse that."
Two weeks after the storm, ordinary people in Myanmar were taking matters into their own hands, sending trucks into the delta with clothes, biscuits, dried noodles and rice provided by private companies and individuals.
'TIME IS LIFE'
With international pressure and outrage at the generals' intransigence growing, the European Union's top aid official flew to Yangon to push for more access for foreign aid workers and relief operations.
Like so many envoys before him, the EU's Louis Michel came away empty-handed but continued to urge the junta to shelve its pride and paranoia about the outside world.
"Time is life," he told reporters at Bangkok airport. "No government in the world can tackle such a problem alone. This is a major catastrophe."
Many refugees, crammed into monasteries, schools and other temporary shelters after the devastating storm, have already contracted diarrhoea, dysentery and skin infections.
Officials said one international health agency had confirmed cholera in the delta, although the number of cases was in line with normal levels at this time of year in a region where the disease is endemic.
"We don't have an explosion of cholera," World Health Organisation official Maureen Birmingham said in Bangkok.
Earlier, the generals signalled they would not budge on their position of limiting foreign access to the delta, fearful that doing so might loosen their grip on power.
"We have already finished our first phase of emergency relief. We are going onto the second phase, the rebuilding stage," state television quoted Prime Minister Thein Sein as telling his Thai counterpart this week.
