There are more questions than answers on what will happen after Title 42 is no longer in effect.

An immigration attorney says it’s likely that U.S. Customs and Border Protection will be overwhelmed as soon as Title 42 is lifted next month.

The policy, which turns away asylum seekers at the border due to COVID-19 concerns, is expected to end on May 23.

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“It's going to be chaos,” immigration attorney Andres Mejer said. “The southern border, no matter what they do, they're not going to be prepared for the number of individuals that are going to be presenting themselves.”

As McAllen city officials prepare, official Department of Homeland Security documents obtained by ABC News show CBP will be doubling their air and bus transportation capabilities, along with increasing their detention space for migrants.

The city of McAllen has similar plans once migrants are released from Border Patrol custody.

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"We've got a few places in mind that could potentially work,” said McAllen Emergency Coordinator Jess Johnston. “We'll address those as they come up."

City officials confirm migrants might be housed in public or private properties, but wouldn't go into details.

Officials with the city of McAllen say they've spent nearly $30 million in federal funds helping take care of migrants at the Anzalduas Park in Mission. The city is planning to stretch the little money that they have left until they get more money from the government, but it’s unclear if they will.