The mayor of Yuma, Arizona, announced on Dec. 19, the withdrawal of his city’s state of emergency that had been issued in response to the humanitarian crisis at the southern border.

“I am grateful to be able to withdraw the Proclamation of Emergency due to the Trump administration’s policy changes that diminish the flow of the migrant family units to the Yuma area and prevent releases into the Yuma community,” said Mayor Douglas Nicholls.

“Today is a momentous day for the Yuma region as I was able to withdraw the Proclamation of Emergency alongside acting Deputy Secretary [Ken] Cuccinelli,” he added.

Nicholls declared a proclamation of emergency at the border in April when the flow of migrants at the southern border surged. In May, more than 144,000 illegal aliens were apprehended or deemed inadmissible for entry, resulting in the highest number of apprehensions in a month in 13 years. The number has dropped sharply since then. November’s figure—42,000—made the sixth consecutive month of declines in the number of illegal alien arrests.

The administration has implemented a number of measures in an attempt to curb the flux of illegal aliens approaching the border, including the Migrant Protection Protocols (MPP) which ended the “catch and release” of migrants by sending them back to Mexico as they await their individual immigration trials. So far more than 53,000 migrants have been returned to Mexico under MPP.

While pro-migrant and humanitarian groups have expressed opposition to MPP, warning the illegals could face violence on return to Mexico, the administration argued that those policies helped slow the crisis and cut down the time it takes to adjudicate a claim.

“The president’s strategy to address the crisis at the southern border, particularly Central American families illegally flooding across the border, has worked and we are seeing an impact in border towns across the country,” said Cuccinelli.

“The number of Central American family units apprehended has decreased by 85% since the height of the crisis in May. And thanks to a number of policies we implemented, we have ended catch and release and are returning, removing, and repatriating more aliens from the border than ever before. Now, communities like Yuma are directly seeing the effect of our efforts,” he added.