Immigration authorities are expressing alarm about the growing number of migrants crossing the southern border.
On two days this week, federal agents apprehended more than 4,000 migrants crossing the border — the highest daily total recorded in 15 years, according to a senior official with Customs and Border Protection.
"The breaking point has arrived," said CBP Commissioner Kevin McAleenan said Wednesday in El Paso, Texas.
"CBP is facing an unprecedented humanitarian and border security crisis all along our Southwest Border — and nowhere has that crisis manifested more acutely than here in El Paso," McAleenan said.
As the weather warms up, immigration authorities warn that the flow of migrants crossing will continue to grow. Federal agents are on pace to apprehend or encounter more than 100,000 migrants in March — the largest monthly total in more than a decade.
The majority of these migrants are families and children fleeing violence and poverty in Central America. McAleenan says they're straining the resources of Border Patrol facilities, which were designed primarily for single men, and are far beyond their official capacity.
"We are doing everything we can to simply avoid a tragedy," McAleenan said. "But with these numbers, with the types of illnesses we're seeing at the border, I fear that it's just a matter of time."
CBP has stepped up medical care for migrants since two children died in custody in December.
But McAleenan says efforts to provide that medical attention have diverted Border Patrol agents away from their security duties.
"Our expanded medical checks and concerted efforts are saving lives," McAleenan said. "But they have a high cost to our enforcement mission."
In response, McAleenan says CBP is redirecting 750 blue-uniformed agents who work at Ports of Entry to help the Border Patrol with the care and custody of migrants. McAleenan warned that could lead to longer wait times at Ports of Entry on the U.S.-Mexico border, but said that "this is required to help us manage this operational crisis."
McAleenan spoke near the metal border fence in El Paso, which has become the latest hot spot for migrant crossings in recent months, as NPR's John Burnett reported earlier this week.
CBP will reluctantly begin releasing migrant families with a notice to appear in immigration court, McAleenan said, instead of first handing them over to U.S. Immigration and Customs Enforcement for processing and detention.
"There's no questioning why this is happening," McAleenan said. "The increase in family units is a direct response to the vulnerabilities in our legal framework where migrants and smugglers know that they will be released, and allowed to stay in the U.S. indefinitely pending immigration proceedings that could be many years out."
But immigrant advocates dispute that. They point out that migrants have a legal right to seek asylum once they're in the U.S.
Critics say the Trump administration has been too focused on deterring migrants from coming, and has not allocated enough resources for humanitarian assistance, or for adjudicating the migrants' asylum claims quickly.
"The Trump administration's response to the multidimensional refugee and migration challenge posed by deteriorating conditions in Central America is one dimensional," said Frank Sharry, the director of America's Voice. "No wonder their simplistic and futile strategy has failed so miserably."
As we have previously reported, there may be several reasons why the number of migrants has grown in recent months — including the reach of social media, lower smuggling costs, and unintended consequences of the Trump administration's own immigration crackdown.