In the past week, border authorities have averaged 4,500 apprehensions per day and facilities aren't equipped to care for the influx of children, the official said.

“This is an emergency,” the official said. “The entire system is overwhelmed, and we are simply trying to safely get them out of our custody as quickly as possible.”

The announcement from CBP comes after local officials in Florida sounded the alarms, insisting their communities are not prepared to manage migrant families.

Palm Beach County Sheriff Ric Bradshaw said that Border Patrol operations in Miami had informed him that as many as 1,000 migrants a month from El Paso, Texas, would be transported to Florida and split between Palm Beach and Broward County, Florida, in the coming weeks.

The CBP official confirmed that Florida had been identified as one of many places where processing could be done but said there were no current plans to send migrant families to Florida.

“We do not have any aircraft flying into Florida at this time,” the CBP official said.

But the agency is looking into “capacity building and contingency plans across the nation,” he added.

Under U.S. and international law, the migrants have the right to claim asylum and plead their case to a judge. But the immigration courts are overwhelmed, and officials say they are struggling just to process so many people at a time.

Some 109,000 undocumented migrants were stopped at the border in April alone. Immigration and Customs Enforcement has released about 180,000 family members since December, while CPB has released 40,000 since mid-March.

Upon notification, officials in Broward County said they began working quickly to alert local nonprofits, shelters and businesses about the new arrivals. But the mayor warned of a potential \"homeless encampment\" if federal assistance isn't provided.

“This is a humanitarian crisis,” Broward Mayor Mark Bogen said in a statement Friday. “We will do everything possible to help these people. If the president will not provide us with financial assistance to house and feed these people, he will be creating a homeless encampment.”

A Broward County official said local authorities weren’t told why their community was selected to receive the migrants.

“It took everyone by surprise,” said Kimberly Maroe, the county’s public information manager.

“We spent a lot of time making sure people don't come into South Florida illegally,” Bradshaw told reporters Thursday. “Well, guess what? The federal government now is bringing people that have come into the country illegally to us that have come over out in El Paso. And I don't think it's right.”

Sen. Marco Rubio sent a letter to the Department of Homeland Security with several questions demanding to know the agency’s plans for transporting migrants to the state.

The CBP official said no cities have been identified yet for mass transfers. When asked which ones were most likely to fall under consideration, the official said: \"Every Border Patrol location we have in the United States.\"

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