Border Patrol agents assigned to the Rio Grande Valley sector detained 1,300 undocumented immigrants in one day, according to the agency records.
The record number of holdings happened on Tuesday. Agents said it is the highest number recorded by RGV agents since June 2014.
"Well this just signifies that the amount of people that are coming through this sector is nonstop," said Herman Rivera, U.S. Border Patrol Agent.
According to U.S. Border Patrol records, many of the immigrants in holding are from Nicaragua, Honduras, Guatemala and El Salvador.
During fiscal year 2018, there were over 99,000 requests for asylum according to U.S. Citizenship and Immigration Service.
Thousands are entering through the Rio Grande Valley.
Agents tell CBS 4 News they're seeing the increase in crossings near Western Hidalgo County and Starr County.
"The Rio Grande Valley sector apprehends people from all parts of life, all over the world," Rivera said. "The RGV sector has seen people from 40 different countries this year alone."
While other sectors are seeing a caravan of migrants arrive, RGV Border Patrol Chief Rudy Karisch said the Valley sees numbers like that often.
"Every 14 days we have as many people that showed up over there as part of the caravan," Karisch said.
Three months into fiscal year 2019, over 201,479 people have been detained trying to enter the country illegally through the Southwest Border.
"Transnational criminal organizations utilize crossing large groups of people like family units, in order to tie up the border patrol agents who leave the area open leaving it open for drugs or people to cross," Rivera said.