WASHINGTON - The top U.S. diplomat in Myanmar says 100,000 may have died in the cyclone and that 95 percent of buildings in the affected area are demolished.

Shari Villarosa heads the U.S. embassy in the capital Rangoon. She says food and water are running short in the Myanmar delta area inundated by the storm. She called the situation in that area "increasingly horrendous."

Villaros told reporters Wednesday: "There is a very real risk of disease outbreaks as long as this continues."

She said that almost all the deaths are in the delta area. In the capital, some 600-700 people may have died. Villarosa also said she does not think the military rulers in Myanmar are blocking U.S. assistance because of the Bush administration's past strong criticism of the junta.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

WASHINGTON (AP) The U.S. military put people and airplanes into position to work on any relief effort for cyclone-hit Myanmar, as officials awaited word on whether the Asian nation would accept American help.

An Air Force C-130 landed in neighboring Thailand and another was on the way, Air Force spokeswoman Megan Orton said Wednesday morning at the Pentagon.

"When they accept, or if they accept and we know what supplies they need those planes will be there to transport those," she said.

A rapid deployment unit designed to be the first people inserted into an operation already works out of Thailand and is at the ready as well. "This is just a positioning of the planes and people," Orton said.

Three U.S. officials said they understood it was possible the Myanmar government would only accept money from the United States and want to buy its own aid supplies or that it would only accept U.S. assistance as part of the broader United Nations effort.

Navy and Marine Corps officials said they were in a holding position, awaiting word on whether they would be needed.

The Navy has three ships participating in an exercise in the Gulf of Thailand that could help in any relief effort the USS Essex, the USS Juneau and the USS Harper's Ferry.

The Essex is an amphibious assault ship with 23 helicopters aboard, including 19 capable of lifting cargo from ship to shore, as well as more than 1,500 Marines.

One official said that if there is a U.S. relief operation, the Essex group would likely leave some of its assets behind so the multinational exercise can still be held, while moving other equipment forward to help Myanmar.

Because it would take the Essex more than four days to get into position, another official said, the Navy is considering sending some of its helicopters ahead. The aircraft would be able to arrive in a matter of hours, and the Essex could follow, he said, speaking on condition of anonymity because that effort was still in the planning stages.

The White House said Tuesday the U.S. will send more than $3 million to help victims of the devastating cyclone in Myanmar, up from an initial emergency contribution of $250,000.

The additional commitment of funds, announced by press secretary Dana Perino, came as Myanmar continued to resist entry for a U.S. disaster assessment team. The Bush administration said permission for such a team to enter the Southeast Asian nation and look at the damage would allow quicker and larger aid contributions.

The State Department said Wednesday it was pressing Myanmar authorities directly in Yangon and Washington to accept the aid and was also asking Myanmar's neighbors and traditional friends, including China, India, Indonesia, Japan, Malaysia and Thailand to help make the case.

The message is: "Use what leverage you have with the Burmese government to get them to allow in outside assistance teams so they can help make an assessment and provide on-the-gound assistance to help out with what is very clearly a humanitarian disaster of immense scope," said spokesman Sean McCormack.

In the meantime, the decision was made to funnel $3 million more to the disaster-stricken zone. Perino said the money would be allocated by a USAID disaster response team that is already positioned in Thailand.

The Treasury Department moved to make it easier for relief agencies and religious organizations to provide assistance to cyclone victims by issuing a blanket license for them to receive financial contributions from United States. Under existing U.S. sanctions on Myanmar, such transactions normally require individual licenses.