CNN previously reported that additional facilities were being discussed, but locations have not been announced.
These temporary border facilities are different from the overflow facility that was opened by the Department of Health and Human Services
to care for migrant children apprehended at the border without their parents.
In Yuma, the city is struggling to care for migrant families that are released by US Border Patrol, Nicholls told CNN.
US Border Patrol on February 15 released migrants into the community for the first time since 2019, he said, adding that "it has steadily grown since then." A couple of nonprofits have stepped in to transport people to shelters and other communities that can care for migrants.
Nicholls said it is primarily families that are being released.
"This is a grave concern for me, as we have very limited nonprofit resources in our community," he said. "We're going to end up with a backlog if we keep experiencing large numbers where people are going to take days and days and days to find their transportation out of town."
The mayor called on the administration to assist the border community and make sure the federal government is addressing the humanitarian issues.
"There have always been fluctuations in the number of individuals we encounter at the border, and we continue to adapt accordingly," Customs and Border Protection said in a statement.
"Based on past experience, evaluation of operational requirements, and challenges due to COVID-19 space restrictions, we need additional processing facilities when we see rising numbers of encounters. As we work to build and improve permanent facilities for the safe and orderly processing of individuals at the border, temporary soft-sided facilities are sometimes necessary to meet operational needs that may arise due to rising encounters, particularly under challenging circumstances," the statement said.
Last month, CBP announced the opening of a soft-sided structure in Donna, Texas, to help with intake. The agency also said it is constructing a soft-sided facility in Eagle Pass, Texas, to help accommodate migrants in its custody.