U.S. Customs and Border Protection officials are releasing approximately 5,600 illegal aliens into three Texas towns.

Of that number, at least 19 have been treated at local hospitals for a “fever.”

While speaking with the Brownsville Herald, Brownsville City Manager Noel Bernal said CBP officials informed him that the 5,600 migrants will be released this week in Brownsville, Harlingen, and McAllen.

“That’s the total number we are aware of and are preparing to process to handle,” Bernal said.

In addition to that, Bernal revealed that 19 migrants in Brownsville alone were running fevers and taken to the local hospital to be treated.

The massive release comes after U.S. Border Patrol Sector Chief Agent Rodolfo Karisch indicated that the the Rio Grande Valley Sector’s resources are “overwhelmed and over-stretched.”

While speaking to reporters last week, Customs and Border Protection chief Kevin K. McAleenan echoed a similar message and revealed that apprehensions hit record highs in the month of March.

McAleenan warned that there is an “unprecedented humanitarian and border security crisis all along our Southwest Border.”

By the end of March, McAleenan predicted that CBP will have apprehended over 100,000 people attempting to cross the southwestern border.

This massive surge in migrants being held at custody facilities as put an unprecedented strain on CBP.

“Here in El Paso, we have almost 3,500 migrants in custody this morning, in facilities designed for many fewer,” McAleenan said. “We had over 1,000 apprehensions on Monday. The vast majority are families from Central America.”

President Trump has also threatened to close the U.S.-Mexico border if Mexico does not do more to curb the migrant caravans marching toward America.

“Mexico is doing NOTHING to help stop the flow of illegal immigrants to our Country. They are all talk and no action. Likewise, Honduras, Guatemala and El Salvador have taken our money for years, and do Nothing. The Dems don’t care, such BAD laws. May close the Southern Border!” Trump wrote.