04/25/2009 05:12 am ET Updated May 25, 2011

Cities Deal With Surge In Shantytowns

FRESNO, Calif. -- As the operations manager of a outreach center for the homeless here, Paul Stack is used to seeing people down on their luck. What he had never seen before was people living in tents and lean-tos on the railroad lot across from the center.

"They just popped up about 18 months ago," Mr. Stack said. "One day it was empty. The next day, there were people living there."

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