The U.S. Department of Health and Human Services (HHS) and the Air Force turned a San Antonio Air Force base into temporary shelter for 100 undocumented children Monday, after being overwhelmed by unusually high rates of underage border-crossers, according to a report by the San Antonio Express-News.

Although the number of migrants attempting to cross the border illegally has plummeted in the past five years, the number of children entering the country illegally without guardians has steadily risen in recent years and months, according to the Unaccompanied Children's Services division of HHS. This spike has prompted temporary fixes like the base shelter, and has strained already-limited resources for the federal agencies and legal advocates who represent undocumented children.

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