CLINT, Texas — Immigrant advocates are asking a federal judge to immediately require inspections and let doctors into border detention facilities where they say sleep-deprived, flu-stricken children are languishing in filthy conditions.

Doctors and lawyers who visited the facilities in recent weeks outlined several damning examples in a court filing late Wednesday that puts more pressure on the Trump administration to improve conditions for immigrant children. Lawyers are also asking for the prompt release of children to parents and close relatives and for the government to be found in contempt of court.

In one account, the court filing describes how five infants were admitted to a neonatal intensive care unit at a hospital after a doctor visited a Customs and Border Protection facility in McAllen, Texas.

Dr. Dolly Lucio Sevier, a pediatrician who met nearly 40 immigrant children at the facility June 15, said in a declaration filed to the court that the conditions there were dire, describing “extreme cold temperatures, lights on 24 hours a day, no adequate access to medical care, basic sanitation, water, or adequate food.” She said there are several teen mothers at the facility.

“It is obvious that the dignity and well-being of children is not even an afterthought in the design of the center,” she wrote.

In another declaration, a 16-year-old girl from Honduras recounted how she and her 8-month old daughter were placed in a facility where they couldn’t shower for eight days.

The girl said her daughter ran a high fever and was given medicine but began vomiting and had diarrhea the next day. She said she asked to see a doctor, but wasn’t taken. “The guard said, ‘She doesn’t have the face of a sick baby,’ ” the girl recalled, adding that her daughter has since lost so much weight her pants are loose.

The Trump administration is facing growing backlash over its handling of a surge in immigrant families and children at the border. Five children have died since late last year after being detained by the government, and lawyers who visited a Border Patrol station near El Paso last week described kids living in squalid conditions with little care and inadequate food, water and sanitation.

They met one sick 2-year-old boy without a diaper who had wet his pants, his shirt smeared in mucus. In another Texas border facility this month, a 17-year-old Guatemalan girl was seen in a wheelchair with a premature baby who advocates said should have been in the hospital.

Customs and Border Protection officials insist that children at the facility in Clint, Texas, are receiving good care.