The mayor of border city McAllen, Texas, is pleading with President Joe Biden not to end a Trump-era pandemic policy for turning away migrants, warning the White House that “no amount of preparation” can ready them for the expected influx of illegal immigrants.

Mayor Javier Villalobos asked the Biden administration to reconsider ending the public health policy, Title 42, which has allowed the Border Patrol to turn away immediately most people who illegally come across the border between ports of entry. But that policy is set to end on May 23, and homeland security officials in Washington have warned that up to 18,000 people could be encountered in a single day.