People hold signs protesting the treatment of asylum seekers held in immigration detention centers Tuesday, July 2, 2019, outside the office of Sen. Pat Roberts in Overland Park, Kan. The protest, with about 150 participants, was one of several held outside congressional offices nationwide calling for the closure of the detention centers. (AP Photo/Charlie Riedel)

"Inhumane." ''Shameful." ''Intolerable." ''Brutal." Mounting revelations about squalid and dangerously overcrowded conditions at Border Patrol holding centers have fueled public outrage heading into the Fourth of July weekend, with protesters taking to the streets and social media to decry the situation as un-American and unacceptable.

The swelling furor over President Donald Trump's immigration polices comes as the administration said Wednesday that it is looking for more properties to permanently hold unaccompanied children who cross the border. Jerry Gonzalez, executive director of the Georgia Association of Latino Elected Officials, called that troublesome given the government's "track record on abuses and child neglect that we have seen nationally." Atlanta is one of five potential locations for new facilities to hold up to 500 children.

"I don't think that this administration is capable of administrating a program in a humane way," Gonzalez said.

Headlines and searing images made public in past days and weeks have served as a stark reminder for Americans far from the border of a crisis for which solutions seem scarce: An immigrant father and daughter drowned in the Rio Grande. Reports that infants, children and teens have been locked up without adequate food and water. Revelations that five children have died in Border Patrol custody since December.

The Homeland Security Department's internal watchdog provided new details Tuesday about severe overcrowding in Texas' Rio Grande Valley, the busiest corridor for illegal crossings, noting children at three facilities had no access to showers and that some children under age 7 had been held in jammed centers for more than two weeks. Some cells were so cramped that adults were forced to stand for days on end.

Government inspectors described an increasingly dangerous situation, both for migrants and agents, with escape attempts and detainees clogging toilets with socks to get released during maintenance. A "ticking time bomb," in the words of one facility manager.

The report echoed findings in May by the department's inspector general about holding centers in El Paso, Texas: 900 people crammed into a cell with a maximum capacity of 125; detainees standing on toilets to have room to breathe; others wearing soiled clothing for days or weeks.

All of that is reverberating: Hundreds have protested this week from Rhode Island and Vermont to Texas and California, as cries to #CloseTheCamps take root on social media. About 50 demonstrators from a Jewish group congregated Wednesday outside a jail in Orange County where immigration detainees are held. Some locked arms and blocked the facility's entrance. Then they sang and prayed for immigrant children who have died in government custody.

"The Jewish community has benefited a lot from this country as an immigrant community, and we have an obligation to make sure torture doesn't happen and that borders remain open to people who are seeking refuge from violence and poverty," said Aryeh Cohen, a rabbi and professor who joined the protest.

Still more demonstrations were planned for the July 4 holiday, including one being organized in Philadelphia by Jewish activists likening the detention of migrants to the treatment of Jews in Nazi Germany.

It all comes as Trump promises the "show of a lifetime" for the hundreds of thousands of revelers who flock to the National Mall every year on the Fourth of July. Tanks are in place for the display of military muscle.

Independence Day, said Democratic Sen. Dianne Feinstein of California, is "a time to celebrate the birth of our country and the founding principles for which it stands. But it's hard to believe anyone feels much pride when they see the images coming out of Border Patrol facilities. Compared to the ideals set out in our founding documents and inscribed on the base of the Statue of Liberty, the situation on our southern border feels like hypocrisy."

Trump said Wednesday that Border Patrol agents are "not hospital workers, doctors or nurses" and again blamed Democrats for rejecting his proposals to fix the immigration system.

"If illegal immigrants are unhappy with the conditions in quickly built or refitted detention centers, just tell them not to come. All problems solved!" the president tweeted.

Customs and Border Protection reported in mid-May that it had 16,000 people in its custody, many in cells equipped with nothing more than concrete benches and an exposed toilet. Immigration and Customs Enforcement, whose facilities are built for longer-term detention, houses more than 40,000 people.

When government inspectors visited the Rio Grande Valley last month, the Border Patrol had some 8,000 detainees in custody in just five holding facilities, with 3,400 held longer than the 72 hours generally permitted. More than 800 children had been in the facilities for longer than 72 hours, with many there more than a week.

At that same time, longer-term ICE facilities, to which detainees are supposed to be moved, had some 54,000 beds occupied nationwide, though it is funded only for 42,000.

"We are concerned that overcrowding and prolonged detention represent an immediate risk to the health and safety of DHS agents and officers, and to those detained," the inspector general's report states. Included were photos showing women and children, including an infant in diapers, piled shoulder to shoulder on the floor of one holding pen. Another photo showed some 88 men crammed into a cell meant for 41, with one pressing a cardboard sign to a window reading: "Help, 40 Days Here."

On Monday, Trump signed legislation to provide $4.6 billion aimed at improving conditions. And the Department of Health and Human Services, which takes custody of unaccompanied children from the Border Patrol, said Wednesday that additional holding sites are being assessed in and around Atlanta, Phoenix, Dallas, Houston and San Antonio, Texas. The department is seeking 20-year leases for most of the sites, signaling they don't expect challenges to fade.

Kevin McAleenan, the acting Homeland Security secretary, noted that arrests on the Mexican border were expected to drop 25% in June from a month earlier, which would end an alarming string of monthly increases in family arrivals — largely from Central America's Northern Triangle of Guatemala, Honduras and El Salvador — and be consistent with a seasonal trend for illegal crossings to fall during dangerously hot summer months.

Nevertheless, Trump is promising that raids to detain immigrants already in the country illegally — delayed from last month— will take place after the July 4 holiday, meaning still more space would be needed to hold still more people. ICE agents are supposedly prepped and ready for sweeps across the U.S.

"After July 4," Trump told reporters earlier this week, "a lot of people are going to be brought back out."

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Associated Press Writers Jeff Martin, Amy Taxin and Ricardo Alonso-Zaldivar contributed.

FILE - In this Friday, June 28, 2019, file photo, temporary mattress pads are stacked up along a tent wall with restroom facilities in the background, as the U.S. Border Patrol unveiled a new 500-person tent facility during a media tour in Yuma, Ariz. A government spokesman says President Donald Trump’s administration is evaluating vacant properties near five U.S. cities as potential permanent sites to hold unaccompanied migrant children. Department of Health and Human Services spokesman Mark Weber said Wednesday that property is being assessed in and around Atlanta; Phoenix; Dallas; Houston; and San Antonio, Texas. (AP Photo/Ross D. Franklin, File)
FILE - In this Feb.19, 2019 file photo, children line up to enter a tent at the Homestead Temporary Shelter for Unaccompanied Children in Homestead, Fla. A government spokesman says President Donald Trump’s administration is evaluating vacant properties near five U.S. cities as potential permanent sites to hold unaccompanied migrant children. Department of Health and Human Services spokesman Mark Weber said Wednesday that property is being assessed in and around Atlanta; Phoenix; Dallas; Houston; and San Antonio, Texas. (AP Photo/Wilfredo Lee, File)
People hold signs protesting the treatment of asylum seekers held in immigration detention centers Tuesday, July 2, 2019, outside the office of Sen. Pat Roberts in Overland Park, Kan. The protest, with about 150 participants, was one of several held outside congressional offices nationwide calling for the closure of the detention centers. (AP Photo/Charlie Riedel)
Pediatricians speak to reporters Tuesday, July 2, 2019, about their experiences treating migrant children in a network of shelters run by Annunciation House, in El Paso, Texas. Left to right: Lisa Ayoub-Rodriguez, Carlos Gutierrez, Jose Manuel de la Rosa and Blanca Garcia. Some of the doctors treated migrant children in Border Patrol detention centers along the Southwest border in 2014. They say Border Patrol no longer communicates with them, even to see what medications a migrant may have been on. (AP Photo/Cedar Attanasio)
Activists gather to call for an end to migrant child detention on Wednesday, July 3, 2019 in Carrizo Springs, Texas. (James Barragán/The Dallas Morning News via AP)
Cheasty Anderson, senior policy director for Children's Defense Fund Texas and one of the organizers of the protest, speaks as activists gather to call for an end to migrant child detention, Wednesday, July 3, 2019, in Carrizo Springs, Texas.  (James Barragán/The Dallas Morning News via AP)
Activists gather to call for an end to migrant child detention, Wednesday, July 3, 2019, in Carrizo Springs, Texas. (James Barragán/The Dallas Morning News via AP)
Activists gather to call for an end to migrant child detention, Wednesday, July 3, 2019, in Carrizo Springs, Texas. (James Barragán/The Dallas Morning News via AP)
Dimmit County Sheriff's deputies inspect three people who were arrested as about 100 activists gathered to call for an end to migrant child detention, Wednesday, July 3, 2019, in Carrizo Springs, Texas. A sheriff's deputy said the three people were arrested for disorderly conduct and interfering with an arrest. (James Barragán/The Dallas Morning News via AP)