John Burnett

For the first time this year, the number of migrants taken into custody by immigration authorities after crossing the Southwest border dropped in June.

The Department of Homeland Security announced on Tuesday that about 104,000 migrants were taken into custody after crossing the Southwest border — a 28% drop from May.

Migrant flows typically slow down in the hotter summer months, and federal officials credited Mexico with doing more to secure its borders and stop migrants from crossing into the U.S.

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The Department of Homeland Security's Office of Inspector General is warning about "dangerous overcrowding" in Border Patrol facilities in the Rio Grande Valley of South Texas.

In a strongly worded report, the inspector general said the prolonged detention of migrants without proper food, hygiene or laundry facilities — some for more than a month — requires "immediate attention and action."

The Department of Health and Human Services is dramatically expanding its network of child shelters across the country in order to avoid the kind of scandal that occurred in Clint, Texas, where scores of immigrant children were warehoused together.

"There are too many kids in Border Patrol stations right now, and we're working to get them out of those stations and into HHS care," says Mark Weber, HHS deputy assistant secretary for public affairs.

Updated at 3:45 p.m. ET Saturday

U.S. Immigration and Customs Enforcement is expected to begin arresting and deporting thousands of migrant families in 10 cities across the country, according to sources familiar with the planned raids.

The roundups are targeted at recently arrived migrant families whose cases were fast-tracked by the Justice Department after being sent final deportation orders from a judge and failing to show up for court.

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Thousands of asylum-seekers from Central America, Cuba and elsewhere have massed in Mexican border cities, waiting and hoping to be granted legal entry to the United States. They have created a humanitarian crisis, and they're growing impatient.

Responding to that crisis, the Trump administration threatened last week to impose tariffs to pressure Mexico to block the streams of migrants who are crossing its southern border bound for the United States.

Central American migrants who were detained in a Border Patrol holding facility in McAllen, Texas, described atrocious living conditions and widespread sickness.

U.S. Customs and Border Protection shut down its largest migrant processing center in South Texas for 24 hours on Tuesday after 32 detainees got sick with the flu. This is the same location where a 16-year-old Guatemalan boy became sick, and died Monday at another Border Patrol station.

Updated 4:45pm E.T.

U.S. Customs and Border Protection temporarily suspended intake at the McAllen Central Processing Center on Tuesday, the largest migrant processing center in South Texas, after the outbreak of what the agency calls "a flu-related illness."

It is the same facility where a 16-year-old Guatemalan boy became ill last week, and died after he was transferred to another Border Patrol station.

Editor's note: This story contains descriptions and photos of human remains that some readers may find disturbing.

Border Patrol agents steer their all-terrain buggy through dense brush on the historic King Ranch. They're looking for a human skeleton.

They spotted bones earlier in the day when they were chasing a group of migrants through this pasture, and they marked the GPS coordinates. Now they're returning with a sheriff's deputy.

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A Guatemalan toddler died in a hospital Tuesday night, just over a month after he and his mother crossed the southwest border and were apprehended, according to the Guatemalan consul in Del Rio, Texas.

The family entered the U.S. from the border city of Juárez, Mexico, in early April. They were apprehended on April 3 on the north bank of the Rio Grande in central El Paso, Texas, according to U.S. Customs and Border Protection.

Guatemalan Consul Tekandi Paniagua told NPR that the 2½-year-old boy "had a high fever [and] difficulty breathing."

For people familiar with the lonesome highways of far West Texas and New Mexico, it's an unusual sight: The ubiquitous Border Patrol checkpoints are all closed. Last month, Homeland Security shifted the checkpoint agents to the border to help process the crush of migrant asylum-seekers.

Otero County, N.M., is so alarmed by the possibility of illegal narcotics flowing north unchecked that it has declared a local state of emergency.

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An Iraq War veteran who is not a U.S. citizen is facing deportation to Mexico over a felony conviction unless an immigration judge decides to let him stay in the United States.

With a dramatic shake-up at the highest levels of the Department of Homeland Security, President Trump has signaled that he wants to get even tougher on immigration.

But how much tougher can he get?

Trump has been frustrated with the inability of DHS to stop a surge of Central American migrant families and children from crossing the Southern border.

Mario Garcia sits in the doorway of his tire shop in Gracias a Dios, Guatemala, a short distance from the border with Mexico, watching the unfettered flow of migrants headed north. By his estimate, up to 1,000 migrants cross over into Carmen Xhan, Mexico, every day.

"This is an open border," Garcia says, with a knowing smile. "There's no immigration control on this side or the other side. Anyone can go across freely."

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The Trump administration is now warning about "fake families" amid the surge of Central American migrants crossing the southern border. Border agents have noticed an uptick in adult immigrants traveling with minors who are not their children. The administration suspects foul play, but immigrant advocates say they're just trying to make it into the U.S. for a better life.

As thousands of migrant parents and children continue to stream across the U.S.-Mexico border every day, the Border Patrol is bringing in more agents and asking the Pentagon for additional help.

The Border Patrol says it needs more manpower to care for the migrants — more of whom are coming with infectious illnesses. Homeland Security Secretary Kirstjen Nielsen says agents are on track to stop nearly 100,000 people crossing illegally this month — far exceeding last month's total.

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The U.S. Border Patrol apprehended more than 66,000 migrants at the Southern border in February, the highest total for a single month in almost a decade.

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When migrant children cross the border without their parents, they're sent to federal shelters until caseworkers can find them a good home. But everything changes when they turn 18. That's when, in many cases, they're handcuffed and locked up in an adult detention facility. The practice is sparking lawsuits and outrage from immigrant advocates.

Thousands of migrant children continue to arrive at the Southern border every month, without their parents, to ask for asylum. The government sends many of them to an emergency intake shelter in South Florida. That facility has come under intense scrutiny because it's the only child shelter for immigrants that's run by a for-profit corporation and the only one that isn't overseen by state regulators.

For nearly a year before family separation became an official and controversial policy of the Trump administration in the spring of 2018, federal immigration agents separated "thousands" of migrant children from their parents. That's according to a government watchdog report released Thursday.

For Tijuana, the Central American caravans that arrived there in November have become a humanitarian challenge. For the Trump administration, they are a national security threat, as well as a potent and convenient symbol of why the United States needs stronger border security.

"We don't know who else is in that group," says Rodney Scott, chief of the San Diego Border Patrol Sector. "The sheer numbers indicate there are nefarious people within the caravans."

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Language matters. Words, acronyms - they can shape the way we view a story or a group of people. We'll consider one term that the government uses now with John Burnett, who covers immigration for NPR out of Texas. Hi, John.

JOHN BURNETT, BYLINE: Hi, Lulu.

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