Trash and sewage are piling up at the squalid tent camps that hundreds of thousands have called home since Haiti's devastating earthquake - and with torrential rains expected any day, authorities are not even close to providing the shelters they promised.

U.S. troops are withdrawing from the shattered capital, leaving many Haitians anxious that the most visible portion of international aid is ending even as the city is still mired in misery and vulnerable to unrest.

The world's bill for the Haitian earthquake is large and growing - now $2.2 billion - and so is the criticism about how the money is being spent.

The first heavy rain since the earthquake briefly doused Haiti's capital Thursday night as relief officials changed tack on dealing with the homeless, demphasizing plans to build big camps outside Port-au-Prince.

Six U.S. bound orphans seized by Haitian officials as they prepared to board a flight to Miami were to resume their journey to American homes on Wednesday after being handed over to the U.S. Embassy.