State and local governments nationwide have struggled to accommodate a homeless population that has changed in recent years - now including large numbers of families with young children. As the WSJ reports, more than 21,000 children - an unprecedented 1% of the city's youth - slept each night in a city shelter in January, an increase of 22% in the past year; as homeless families now spend more than a year in a shelter, on average, for the first time since 1987. New York City has seen one of the steepest increases in homeless families in the past decade, advocates said, growing 73% since 2002, and "is facing a homeless crisis worse than any time since the Great Depression."