Dozens of Haitian children rescued from an orphanage after last week's earthquake arrived Tuesday in Pennsylvania to be placed with foster families until adoptions are finalized

Gov. Edward Rendell, who traveled to Haiti to accompany the orphans back to his state, said the 53 children from the Bresma Orphanage in the Haitian capital of Port-au-Prince were flown to Florida on an Air Force C-17 transport plane. They were then transferred to another plane to fly to Pittsburgh, he said at a news conference at the airport

Another child is to arrive in Pittsburgh late Tuesday or Wednesday, Rendell said. Ali McMutrie, a Pittsburgh-area woman who ran the orphanage with her sister, Jamie, said her sister will be accompanying the 54th orphan

"The children are incredible. They're doing so great. I was more upset at the airplane ride than any of them," said McMutrie, who also was at the briefing

Most of the children's adoption cases were at the end of the bureaucratic process before the 7.0-magnitude earthquake struck

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According to Rendell, adoption cases are under way for 47 of the children. Of these, 40 will be U.S. adoptions, four children will go to Spain and three to Canada. Adoptive parents will be sought for the remaining seven children

"We are all grateful the kids are here and safe, but this was a very unusual situation," an Obama administration official, who did not want to be identified, told CNN.

"We will continue to grant, in special cases, humanitarian parole for orphans and medical evacuees, but our position is clear that people from Haiti attempting to enter the country illegally will be repatriated

Also on the flight from Haiti were several doctors and some members of Congress. The children were taken by bus to Children's Hospital of Pittsburgh

Allegheny County spokesman Kevin Evanto told CNN that the children will be placed in foster homes until details of their adoptions are finalized