The concerned pediatricians contacted Colleen Kraft, president of the American Academy of Pediatrics, and she flew to Texas and visited a shelter for migrant children in the Rio Grande Valley. There, she saw a young girl in tears. “She couldn’t have been more than 2 years old,” Kraft says. “Just crying and pounding and having a huge, huge temper tantrum. This child was just screaming, and nobody could help her. And we know why she was crying. She didn’t have her mother. She didn’t have her parent who could soothe her and take care of her.”

The number of migrant children in U.S. government custody is soaring — partly the result of a policy decision by the Trump administration to separate children from their parents who are being prosecuted for unlawful entry. Hundreds of the children being held in shelters are under age 13.

Medical professionals, members of Congress and religious leaders are calling on the Trump administration to stop separating migrant families. They question whether these shelter facilities are appropriate for younger children.