PORT-AU-PRINCE, Haiti (January 22, 2010)--About 1 million Haitians are now living in about 600 impromptu settlements in the aftermath of last week's deadly earthquake, according to an international public health organization.

Foreign crews are leveling ground on the outskirts of the capital for tent cities, where the refugees will have water and sanitation, and where they’re expected to be healthier and safer than in the makeshift camps where earthquake survivors are living now.

But one relief official said the settlements "cannot be built overnight," and it could take weeks to move people into them.

Many Haitians aren't waiting.

Aid officials say about 200,000 have fled the capital by bus or ferry or on foot.

Some are planning to stay with relatives elsewhere in Haiti.

Search teams, meanwhile, are giving up hope of finding anyone else alive, as efforts are focused on expanding aid for survivors.

Relatives said they pulled an 84-year-old woman alive from the wreckage of her home Friday, but doctors aren't optimistic that she will survive.