As thousands of Honduran migrants make their way to the U.S. border, the incoming Biden administration, just days from taking office, has a message: Don’t come now.

President-elect Joe Biden has promised an end to the strict immigration policies of the Trump administration, which focused on building a border wall and restricting eligibility for asylum.

But those promises may be put to the test in the new government’s first days. If would-be emigrants from Central America perceive that now is the time to travel to the U.S., the southern border could quickly be overwhelmed before systems are put in place to handle the influx.